The results showed that the mean proportion of polymorphic loci ( ppb ) of anabasis aphylla, which comprised 3 subpopulations ( 58 individuals sampled ), generated by 16 primers was 94. 56 %, the value of ppb of ceratocarpus arenarius, which had 4 subpopulations ( 80 individuals sampled ), using 16 primers was 98. 00 %. the paper had proved that the higher genetic diversity and the genetic differentiation existed in the populations of boih anabasis aphylla and ceratocarpus arenarius, while the latter had much more genetic diversity than the former. moreover, the study discussed the shannon information index and nei ' s gene diversity index of the two species natural populations, which indicated that there were more genetic variations within the subpopu
另外，
通過rapd資料的聚類分析及相關性分析研究，發現無葉假木賊和角果藜自然種群的遺傳結構與綠洲
沙漠過渡帶的微生境生態因子（主要是土壤因子）相關，其中無葉假木賊亞種群遺傳多樣性水平不僅與土壤含水量（ w ） 、鉀鈉離子濃度（ k + na ）和氯離子濃度（ cl ）呈顯著的正相關（ p 0 . 05 ） ，還與土壤中有機質（ som ） 、全氮（ nt ）和全磷（ pt ）含量呈顯著的負相關；同時，角果藜種群的遺傳多樣性水平與土壤中有機質（ som ）和全氮（ nt ）含量呈顯著的正相關，而與co _ 3 ~ （ 2 - ）濃度呈顯著的負相關；除此之外，其它土壤生態因子與兩物種遺傳多樣性水平的相關性均不顯著（卜0 . 05 ） 。
The reproductive characteristics and population structure of artemisia ordosica, hedysantm scoparium, caragana korshinskii and the reproductive characteristics of annual plants eragrostis poaeoides and bassia dasyphylla were observed in shapotou artificial revegetation area. stability of the artificial vegetation was appraised from the views of its persistence and variability under local natural condition. the study showed that : the artificial - natural vegetation built with sandbreaks and plants is stable in shapotou area
通過對
沙坡頭人工固
沙植被區主要建植種群檸條（ caraganakorshinskii ） 、花棒（ hedysarumscoparium ）和油蒿（ artemisiaordosica ）的繁殖特性及種群結構的研究，以及自然侵入的一年生草本植物小畫眉草（ eragrostispoaeoides ）和霧冰藜（ bassiadasyphylla ）繁殖特性的研究，探討了在植被的持久性和變異性，分析評價了主要受惡劣環境壓力下的人工固
沙區植被的穩定性。
Using the hulscher model of the formation of sand waves and sandbanks, under the ancient bathymetry, or under the modern bathymetry, the stokes number of the tidal flow and resistance parameter in the radial sandbanks satisfy the conditions for the formation of sandbanks. the research demonstrates that the dynamic flow conditions result in the development of tidal current sandbank. the radial sandbanks and it ' s asymmetrical distributions will still maintain in the future
應用hulscher
沙波及
沙脊增長模式，
通過對該海域斯托克斯數及底部阻力參數的計算首次發現，南黃海輻射
沙脊群海域在概化古地形和現代輻射狀
沙脊群水下地形情況下，其斯托克斯數及底部阻力參數均滿足形成潮流
沙脊的條件。
The deposition of bed load sediment was greatly reduced in the sump by adding a flushing gallery
通過在集水池底設置排
沙廊道，較好地解決了推移質泥
沙淤積問題。
Based on the study of sediment transport under the actions of tidal currents and wind waves, a mathematical model of suspended load and bed load for yangtze estuary is developed
摘要
通過對長江口徑流、潮流和波浪共同作用下的泥
沙運動規律的研究，開發並建立了長江口全
沙（懸
沙和底
沙）數學模型。
From orsha they fled on along the road to vilna, still playing the same game of blindman with the pursuing army
他們又從奧爾
沙沿著
通往維爾納的大路繼續向前逃跑，還是那樣，和追擊的軍隊又玩起了捉迷藏的游戲。
To get the wayward whales headed in the right direction, researchers with the sausalito - based marine mammal center planned to play recorded humpback sounds from a boat thursday as the tide goes out, then use more boats lining the channel to try to prevent the two from turning around
為了讓兩只迷路鯨魚朝著正確方向，梭
沙立托地區的海洋哺乳動物中心工作人員計畫周四在退潮時，從船上播放錄好的座頭鯨聲音，並且用許多小船限制
通道，以免兩只鯨魚掉頭。
Through experiment on the influence factor of calcic - mortar ' s performance, we find out the best cement contrast minute stone for compounding, strength of cement, configuation craft, maintenance system and minute stone cement intensity grading
摘要
通過對鈣性黏結砂漿性能影響因素的試驗研究，找出了配製鈣性黏結砂漿的最佳灰砂比、水泥強度等級、配製工藝、養護制度為和
沙子級配。
Methods of test for mortar for masonry - determination of water absorption coefficient due to capillary action of hardened mortar
磚石結構用灰漿試驗方法.
通過硬化
沙漿的毛細管作用測定吸水率
Cemf is located at the center area of shapingba district which is a cultural area in congqing city with convenient communication and transportation
工廠座落在重慶市的文化區
沙坪壩區的中心地帶，交
通極為便利。工廠佔地面積
Notices on clearways in sha tin
有關
沙田區有關禁止上落客貨區的最新
通告
Abstract : by means of natural, coagulative and sand peak coagulative settling test, the flowing water test of high, sub, and low turbidity water containing most of coarse silt have been research. some results are concluded
文摘:
通過自然沉澱、混凝和
沙峰型混凝沉澱試驗，對以"粗」組分泥
沙為主的高濁度水和低濁度水進行了動水試驗研究，取得一些成果
Biogen - tab is an effective and invaluable medicine for many poultry diseases, particularly chronic respiratory disease, infectious coryza, salmonelloses fowl typhoid and paratyphoid infection, blue comb disease, fowl cholera, coccidiosis, and leucocytozoon disease. the diseases infected by virus, such as newcastl disease, avian encephalomyelitis are found not to be effected by biogen - tab treatment
愛禽美對許多家禽疾病是相當有效的藥品，特別是慢性呼吸器病，
通稱crd ，傳染性可利查，
沙士桿菌病如家禽傷寒，副傷寒，藍冠病，家禽霍亂，球蟲病，及白冠病等但有些疾病，由病毒感染者無效如新城雞瘟，傳染性喉頭氣管炎
In response to media questions, dr yeoh reiterated that ha s three - colour response system was intended for internal communication and in fact it formed part of the government s overall response system on sars
楊醫生在回應傳媒提問時重申，醫管局的紅黃綠三色警示系統主要為內部溝
通之用，事實上，醫管局的系統正是政府防禦
沙士三級應變系統的組成部分。
It is hard to modify or control the shape of model sand by common ways of comminution
通常的粉碎方法時塑料模型
沙不規則顆粒形貌的控制和改善是十分困難的。
In order to reduce the re - deposit volume of the dredged channel, the method must be based on decreasing the oncoming sediment, changing the mouth site, builting the sediment control dam and raising the reservoir level
為了最大限度地減小疏浚挖槽的回淤量，必須依靠控制上游來
沙量、調整入水口門位置、加設防淤堤及提高庫水位等手段，而不能
通過調整挖泥槽寬度、位置及數量等措施來達到目的。
The suspended sediment of natural streams is usually made up of grains with a broad spectrum of sizes and fall velocities.
天然河流的懸
沙，
通常系由各種大小尺寸和沉速的粒子組成。
Using this method, satisfactory results about the evolution of the seabed are obtained, which is consistent with in situ observations
用海底泥
沙通量代替散度來表徵海底的沖淤，物理概念明確。
With all these ways, the sediment transportation and concentration of the yangtze river will be half of nowadays for a long time and close to the situation of the tang and song dynasty
治水必治沙，通過「蓄水減沙，借水攻沙」的工程措施，和堅持不懈的水土保持， 「標本兼治」 ，可使長江輸沙量、含沙量長期減少1 / 2 ，恢復到唐宋時代水平。
