Cryptic species have been found in a wide range of marine organisms ; with majority of them are benthic invertebrates. in contrast, marine holoplanktons are thought to have lower diversity and slow speciation due to their strong dispersal potential. this paper reviewed studies on cryptic species and speciation in marine holoplankton. based on findings in 38 studied taxa, it was concluded that : 1 ) cryptic species are pervasive in marine holoplankton, suggesting holoplankton speciation was more active than previously thought ; 2 ) current morphospecies diversity is untenable to reflect true species diversity in marine holoplankton ; 3 ) geographic isolation may facilitate cryptic speciation of marine holoplankton. however, contribution of allopatric speciation is still questionable ; 4 ) ecological speciation may be the prevailing speciation mode in marine holoplankton. cryptic speciation in marine holoplankton is paradoxical, because rapid speciation under strong gene flow is countertuitive. solution of this paradox will help us gain deep insights of marine speciation and biodivesity
隱種廣泛存在於各類海洋生物中,尤其是底棲無脊椎動物.然而,海洋終生浮游生物由於具有較強的擴散能力,往往被視為生物多樣性低、物種形成慢.本文就海洋終生浮游生物隱種與物種形成的研究作一綜述.基於研究的38個種類,結果表明: 1 )海洋終生浮游生物普遍存在隱種,其物種形成要比想象
得快; 2 )由於引種的廣泛存在,形態種生物多樣性無法反映海洋終生浮游生物真正的物種多樣性; 3 )地理隔離有
助於海洋終生浮游生物隱種的形成,但異域物種形成的作用仍值
得商榷; 4 )生態物種形成很可能是海洋終生浮游生物物種形成的主流模式.海洋終生浮游生物強基因流下快速的物種形成有悖于生物進化常理,解決該悖論將有
助於我們對海洋物種形成和生物多樣性的理解
Amazonian governors are more committed to this than ever before, he reckons, and now brazil wants the rest of the world ' s help
他承認,亞馬遜的執政者比以往任何時候都要投入,現在,巴西希望
得到世界上其它國家的幫
助。
To appose japan successfully, china must seek assistance from other powers.
要抗日成功,中國也必須
得到其他國家的援
助。
I wish to obtain a graduate assistantship so that l may support myself and obtain more practical expertence while pursuing graduate study
我希望獲
得研究生
助教獎學金,以便在研究生期間能自立和獲
得更多實踐的機會。
When you are applying for admission, you only need to be a quality applicant. but when you are applying for an assistantship ( a ta, ra, or ga ), you need to show that you have the skills to do the job
申請入學時,你只需成為一名合格的申請者,但是當你申請資
助(
助教、
助研或研究生資
助)時,你就
得表明你有能力做這項工作。
A new method on seeking asymptote is given by applying the relation between secant and asymptote, this method is helpful to train creativity of students
摘要利用曲線割線的極限
得到曲線的漸近線,給出了求漸近線的一種新方法。這種方法直觀性強,有
助於培養學生的創新能力。
On today ' s occasion of 10 - year anniversary of beijing sheng wang company, on behalf of the china audiology development foundation, i would like to present our congratulations to ms. li qiong and all people working in sheng wang company
經過十年艱苦努力與創業,聲望公司已經發展成為在中國聽力保健業務領域中具有較強實力和相當規模的全國性專業
助聽器驗配連鎖機構, 「聲望聽力」業已成為在廣大聽障人士中
得到廣泛肯定與良好口碑的服務品牌。
The party is given secret financial support by some foreign backer
該黨
得到外國一些支持者的秘密資
助。
Throughout the history of gyro testing on servo runs, these timers have proven irreplaceable for backup data behind far more complex timing devices.
從整個伺服運轉的陀螺試驗過程來看,證明不能用后來更復雜的記時裝置代替這種記時器來
得到輔
助數據。
Kuo, who won his first career game, received home runs from rafael furcal and nomar garciaparra, but needed nothing more than the two gift runs that scored in the first inning on david wright ' s throwing error
獲
得首勝的郭泓志,
得助於費可與諾瑪的陽春炮為的兩分,但願其實只要萊特第一局暴傳奉送的兩分禮,就綽綽有餘了。
To sleep after the manner i speak of, absolute calm and silence are necessary, and then a certain preparation " -
我所說的那種睡眠,必須要有一個寧靜的環境,而且還
得助於某種藥劑。 」
Being in that position has helped hong kong to cope with the financial turmoil that swept through asia and beyond in 1997 - 1998
事實上,香港亦是
得助於這些穩固的基礎,才能安然渡過九七至九八年肆虐亞洲及其他各地的金融風暴。
But in case we want to express our deep willingness to help and deep desire for them to receive help, also to think that more sheets maybe shared by more beings needing them, then we can burn as many as we want
然而為了表達我們深摯的樂于幫助,深摯的願望他們得助,以及想說多些張也許能讓更多有此需要的有情分享,因此我們可以隨意火化很多。