无脊椎的

The identity between pmDmrt2 and the Dmrt2 of Danio rerio, Xenopus Laevis , Gallus gallus , Mus musculu ,Homo sapiens is 95%, between pmDmrt3 and the Dmrt3 of Danio rerio, Oryzias latipes, Gallus gallus, Rattus norvegicus,Homo sapiens is 85%, and 97% between pmDmrt4 and the Dmrt4 of Oryzias latipes and Takifugurubripes. Our results further reveal the evolutionary conservation of the DM domain gene family in both invertebrates and vertebrates.

序列分析表明，pmDmrt2编码的氨基酸序列与斑马鱼、爪蟾、红原鸡、家鼠、人等的Dmrt2的一致性为95 %；pmDmrt3编码的氨基酸序列与斑马鱼、青鳉、红原鸡、家鼠、人的Dmrt3的一致性为85%；pmDmrt4编码的氨基酸序列与青鳉、红鳍多纪鲀的Dmrt4一致性高达97%，进一步证明该基因家族在无脊椎动物和脊椎动物都具有高度的进化保守性。

The riv- er′s health status can be determined through a holistic appraisal of rivers and their surrounds.Five components of the rivers health include: water quality, aquatic life, physical form, hydrology and streamside zone.Many methods and criteria are available to assess the status of river ecosystem, and this review focuses on RIVPACS,AUSRIVAS,IBI,RCE,ISC,RHS and RHP, which are classified into the pred...

阐述了河流健康状况的内涵，尝试从理化参数、生物指标、形态结构、水文特征、河岸带状况5个方面表征河流的健康状况；并从预测模型法和多指标评价法角度对河流无脊椎动物预测和分类系统、澳大利亚河流评价计划、生物完整性指数、RCE清单、溪流状态指数、河流生态环境调查、河流健康计划等河流健康状况的评价方法进行评述；在探讨美国、英国、澳大利亚、南非等国家河流健康状况评价开展情况的基础上，指出我国迫切需要构建一套适合国情的河流健康状况评价体系，从河流健康角度评价国内主要河流的生态环境质量，并为广泛开展的河流恢复项目提供基础数据和决策依据。

Any of various invertebrates, as those of the phyla Annelida, Nematoda, Nemertea, or Platyhelminthes, having a long, flexible, rounded or flattened body, often without obvious appendages.

虫：几种无脊椎动物中的一种，如环节动物门、线虫类、纽形动物或扁形动物门，有长的、柔软的、圆的或扁平的身体，经常没有明显的附属肢体

Mitochondrial 16S rRNA gene and COⅠ gene fragments were amplified and sequenced from 4 wild populations of Portunus trituberculatus. Respectively, 524bp and 658bp long partial gene fragments of the 16S rRNA gene and the COⅠ gene were obtained. A high percentage of A+T base composition in the two sequences was observed, which was similar to the results of studies on drosophila, shrimp, crab and other invertebrates.

对分别采自辽东湾、莱州湾、海州湾和舟山的三疣梭子蟹4个野生群体的线粒体16S rRNA和COⅠ基因片段进行了扩增和测序，分别得到长度为524bp和658bp的片段。2段序列的碱基组成均显示较高的A+T比例（16S rRNA基因70.8%，COⅠ基因63%），这与果蝇、虾类、蟹类等无脊椎动物的16S rRNA和COⅠ基因片段研究结果相似。

This EcoSystem aquarium exhibits such tight nutrient cycling that Markus intentionally adds ammonium chloride (NH4Cl) to his tank on a daily basis to keep his corals from bleaching even though his tank is filled with invertebrates and highly active anthias fish which he feeds on a constant basis. The prolific growth of this truly mixed reef aquarium is so rampant that Markus harvests between 50-100 frags each month just to keep the growth in check.

这个EcoSystem的系统，由于超低的营养盐，需要每天添加阿摩尼阿(NH4CL)，否则由于营养盐过低，珊瑚会白化，虽然已经添加了大量的无脊椎生物还有一大堆的宝石石，并且维持均衡的喂食，这个缸的SPS生长可以用疯狂来形容，每个月需要剪出50~100个断支，这也是观察珊瑚是否健康的一种途径。

Species had three kinds of diets during the non-breeding season:(1) mainly invertebrates,(2) mainly fruits, and (3) mainly nectar. This study demonstrated that the diets of 14 passerines during the non-breeding season were significantly correlative with tongue morphology (r=0.424, P .05) and were most correlative with brush length and width of the 3/4 position (r=0.62, P.05). For example, Yuhina brunneiceps's primary diet is nectar and it has the brush-tipped tongue with the longest brush length. Niltava vivida mainly forages for fruits and has a tongue with longer width of the 3/4 position.

十七种鸟类在非生殖季时的食性，亦可分为三大类群：（1）主食无脊椎动物；（2）主食果实；（3）主食花蜜。14种鸟类的舌部形态与其非生殖季食性具有显著相关，其中，仅舌分叉长及3/4位置的舌宽与其食性较有关系，可解释非生殖季食性约36%的解释变异量，也就是分叉长较长的舌头属於刷状卷曲舌形，主食花蜜，以冠羽画眉为代表；3/4位置舌宽较大的舌形，主食果实，以黄腹琉璃为代表。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷