鳥類的一種 的英文怎麼說
中文拼音 [niǎolèideyīzhǒng]
鳥類的一種
英文
towhee-
To support his hypothesis he pointed out that several fossilsofthe oldest known bird, archaeopteryx, lack feathers
為了證明這種觀點,他指出,已知的最早的鳥類始祖鳥的一些化石也沒有羽毛。To support his hypothesis he pointed out that several fossils of the oldest known bird, archaeopteryx, lack feathers
為了證明這種觀點,他指出,已知的最早的鳥類始祖鳥的一些化石也沒有羽毛。Monitoring the whole avifauna ( community ) both in breeding season and non - breeding season. individual and population are good indicators of environment pollution, and there are still some questions about the guild monitoring and community monitoring. finally, we surveyed bird species and relative abundance in three areas of the upper reaches of minjiang river during both summer and autumn
普遍意義上的用鳥類監測環境主要包括: 1監測某一種的繁殖期和非繁殖期(冬季)種群; 2監測不同種的種群動態; 3監測整個鳥類區系的種群動態和群落動態,也就是( 1 )種群及個體; ( 2 )種團; ( 3 )群落三個層次。A catbird, the northern mocker, lit in a tree over tom s head, and trilled out her imitations of her neighbors in a rapture of enjoyment ; then a shrill jay swept down, a flash of blue flame, and stopped on a twig almost within the boy s reach, cocked his head to one side and eyed the strangers with a consuming curiosity ; a gray squirrel and a big fellow of the " fox " kind came skurrying along, sitting up at intervals to inspect and chatter at the boys, for the wild things had probably never seen a human being before and scarcely knew whether to be afraid or not
有一隻貓鵲一種北方的學舌鳥在湯姆頭頂上的一棵大樹上落下來,模仿著它附近別的鳥兒的叫聲,叫得歡天喜地。隨后又有一隻?鳥尖叫著疾飛而下,像一團一閃而過的藍色火焰,落到一根小樹枝上,湯姆幾乎一伸手就能夠到它。它歪著腦袋,十分好奇地打量著這幾位不速之客還有一隻灰色的松鼠和一隻狐貍類的大東西匆匆跑來,一會兒坐著觀察這幾個孩子,一會兒又沖他們叫幾聲。Although less comprehensive, the mammal collection nevertheless has a good variety, including such diverse creatures as australia ' s egg - laying mammal, the echidna, and the world ' s third - largest cat, the jaguar
園內飼養的哺乳類動物,種類雖不及雀鳥全面,但也種類繁多,由針鼴(一種產卵的哺乳類動物)以至屬於世界上第三大貓科動物的美洲虎都有。The arkansas sighting was later challenged by ornithologists, who argued that it was impossible to rule out the more common pileated woodpecker
阿肯色州的發現后來被鳥類學家置疑,他們說很難排除那是一種很普通的紅冠黑啄木鳥The great bustard is polyphagia bird, but it feeds mainly on plants. the feeding field habitat selection relate with that whether the grassland burn or not last year. the important factors that determine the feeding field selection are the plant species, vegetative cover score. density hemerrocallis minor and the density of pedacularis sp. on burning grasslandsjthe density of vegetation. insects quanlity. plant species richness and the height of plant are the main factors that determine the feeding field selection on unburning grasslands
大鴇是雜食性鳥類,但以植物性食物為主。對于取食地的選擇往往跟草原上一年是否被火燒過有關。在火燒地,植物種類數、植被蓋度、小黃花菜密度和蒿密度是取食地選擇的重要因素;在非火燒地,植被密度、昆蟲數量、植物物種豐富度及植物高度在大鴇取食地選擇中發揮重要作用。So the results indicate that the two mutants have no significant difference in the toxicity of inhibiting mammal neuron sodium channels, and ala20 or ser20 was not the key residue. the two peptide neurontoxins inhibite mammalian voltage - gated sodium channels through a novel mechanism distinct from other known spider toxins such as 5 - actxs, - agatoxins i - vi which banded receptor site 3 to slow the inactive time course of sodium channels. we suggest that hntx - v maybe target the site 1 of sodium channels in a similar manner to - conotoxins and ttx
同時兩種海南捕鳥蛛毒素從影響ttx一s鈉通道的方式上來看,與其它已知膚類蜘蛛毒素如6一actxs等通過作用於位點3引起延緩鈉通道的失活時間存在明顯不同,我們推測hntx一iv和iintx一v可能是以一種新的不同於其它蜘蛛毒素的方式來影響鈉通道的,而ttx一s鈉通道位點1則很有可能便是它們的作用位點,與ttx和林一eonotoxins相似。One ornithologist had devised a formula to compute the ratio of domestic to pure - strain wild turkey in an individual bird by comparing the angle of flight at takeoff and the rate of acceleration
有個鳥類學家設計了一種計算公式,對家養火雞和純種野火雞進行起飛角度和加速度的比較。Huwentoxin - i ( hwtx - i ) is a polypeptide neurotoxin isolated from the crude venom of chinese bird spider selenocosmia huwena. its molecular weight is 3750 dalton. the toxin contains 33 amino acid residues and three disulfide bonds
虎紋捕鳥蛛毒素- ( huwentoxin - )是從虎紋捕鳥蛛selenocosiahuwena粗毒中分離得到的一種多肽類神經毒素,分子量為3750 ,由33個氨基酸殘基組成,含三對二硫鍵。At present, the extant numbers in the world are gradually decreasing, so the species is classified as one of the endangered birds, and obtained the priority conservation as endangered species of the world
目前世界現存總量逐漸減少,因此已被列為世界最瀕臨滅絕的鳥類之一,並獲得世界瀕危物種保護的優先權。Among the many findings an analysis published last week on birds in the lower layers of greenery found that it would take a fragment measuring at least 2 500 acres ? 10 times as large as the biggest one in the experiment ? to prevent a decline of 50 percent in those bird varieties in just 15 years or so
在大量的調查結果中,上周出版的一篇關于生活在綠地較低層的鳥類的分析報告發現,至少需要一塊2500英畝的森林區域? ?相當于實驗中劃出來的最大的一塊試驗區的10倍? ?才能防止那些鳥類的品種在僅僅15年左右的時間里減少50 % 。The effect of patchy - distribution of mangrove on birds was complexity. its increased habitat heterogeneity can attract some different type birds. however, its result of fragmetating mangrove habitat decreased the species diversity and population size of birds
紅樹林斑塊分佈對鳥類影響比較復雜,一方面斑塊生境異質性高,可以吸引不同類型鳥類,另一方面又導致了紅樹林生境的破碎化,減少了鳥類的活動空間,從而導致鳥類種類和數量的減少。Magpie - robins are a common species of bird found year - round in hong kong. they are also popular as cage - birds
鵲鴝為本港常見的鳥類之一,亦是其中一種常被人類飼養的觀賞雀鳥。Already appearing in the neolithic age usually had no ancient piece of jade of pattern ; one to is it abound with line pu or valley line ancient piece of jade on surface, the warring states of times to start ; one kind is that there are pattern bird lines or ancient pieces of jade of beast s line in the perimeter ; one to carve animal s line wall completely, the the last kind is the most exquisite
漢代玉璧據夏鼐研究,有四種類型,一種是新石器時代已出現的子素無花紋璧一種是始於戰國時代的表面滿布蒲紋或谷紋璧一種是周邊有圖案化的鳥紋或獸紋璧一種是透雕動物紋壁,以最後一種最為精美。Huwentoxin - i ( hwtx - i ) is a polypeptide neurotoxin isolated from the crude venom of chinese bird spider selenocosmia huwena, a chinese bird - hunting spider defined as a new species of the family selenocosmia. its molecular weight is 3750 dalton
虎紋捕鳥蛛毒素- ( huwentoxin - ,簡成hwtx - )是從我國捕鳥蛛新種虎紋捕鳥蛛( selenocosmiahuwena )粗毒中分離純化的一種多肽類神經毒素。North america ' s largest bird, the californian condor, was recovered from the brink of extinction in the 1980s by means of an intensive captive - breeding programme run by researchers at the san diego and los angeles zoos
加利福尼亞禿鷲是北美洲最大型的鳥類, 20世紀80年代它們被人類從滅絕的邊緣拯救過來,採取的方法是由研究人員在聖地亞哥動物園與洛杉磯動物園進行的一種精準人工飼養計劃項目。Today, most researchers agree that birds are, indeed, a branch of the dinosauria
今天,多數研究人員都一致同意鳥類的確是恐龍的分支物種。This surprisingly high proportion has two main causes. first, the territory is situated on a prime migration route through asia. and second, hong kong has a great range of habitats and thus can support a wide diversity of bird species
本港雀鳥品種繁多的原因有二,第一是香港地處候鳥取道亞洲的主要遷徙路線第二是各式各樣的生境,能照顧不同鳥類的需要。Both the grazing frequency and different number of herd influence the species composition of bird community, the bird species increasing following the decreasing of grazing frequency ; and the biomass decreasing following the increasing of grazing frequency, the bird species increasing following the decreasing of the number of herd ; the biomass of bird community decreasing following the increasing of the number of herd the grazing disturbance influences bird community structure by two ways : one way is that grazing disturbance influences bird community directly ; the another way is that grazing disturbance influences bird community indirectly by changing vegetation structure and habitat structure
放牧頻次和不同數量的牧群影響鳥類群落種類組成,隨著放牧頻次的減少,鳥類群落組成的物種數增加;隨著放牧頻次的增加,鳥類群落的生物量呈現出顯著的遞減。隨牧群數量的減少鳥類群落組成的物種數減少;隨著牧群數量的增加,鳥類群落的生物量呈現出遞減的趨勢。放牧干擾對鳥類群落組成影響的原因有兩方面:一是牧群的直接干擾;另一個原因是放牧影響植被結構和生境結構的變化,間接對鳥類產生影響。分享友人