1.
In some, a destructive fishing practice called bottom trawling, which scours life from the ocean floor, is permitted.
有些地区对海洋底层生物掠夺性捕捞的破坏性底层拖网式捕捞事实上是允许的。
2.
Plankton is at the bottom of the marine food chain.
浮游生物处于海洋食物链的最底层。
3.
The Study of Biodiversity on the Benthic Boundary Layer Fauna in the Yellow Sea During Summer;
黄海夏季底边界层动物生物多样性的研究
4.
chromogenic substrate
显色底物，生色底物
5.
A tarlike substance sprayed on the underside of a vehicle to prevent rusting.
底部防锈层喷在交通工具底部以防止生锈的类似柏油的物质
6.
(biology) permanently attached to a substrate; not free to move about.
（生物学）永久的附在底层；不能自由四处移动。
7.
The People in the City and the City of People
论当代中国城市文学中底层人物的生存诉求
8.
Research on Near the Bottom of Deepsea Biological Larva Pressure-retained Sampler of Multiple Nets Subsection/Layered;
深海近底层多网分段/分层生物幼体保压取样器研究
9.
Biogeochemical Characteristics of Organic Carbon in Surface Sediments From the Chukchi Sea
北极楚科奇海海底表层沉积物有机碳的生物地球化学特征
10.
Bottom of Politics and Life--A Discussion on the Enlightenment of Anti-Japanese Literature for Grass-roots Writing;
政治的底层与生命的底层——谈抗战文学对“底层写作”的启示
11.
a genus of plants with pods that ripen underground (see peanut).
一种在地底下长的扁豆层（可看到花生）并成熟的植物的属。
12.
Some of the commonly specified coatings include epoxies, coal tar derivatives and sacrificial zinc primers.
通常采用的涂层包括：环氧树脂，煤焦油衍生物和无锌底漆。
13.
The stirring aria on the life of the bottom class:an interpretation of LUO Wei-zhang s novel The Ballad of Sister-in-law;
一曲悲壮的底层社会人物生活咏叹调——读罗伟章小说《大嫂谣》
14.
The Life of Hong Kong Lower Level Societies--By Unimportant Person s Images in the Novels of Dong Rui;
香港底层社会的人生面影——论东瑞小说中的小人物形象
15.
"Biosphere:Relatively thin life-supporting stratum of the earth's surface, extending from a few miles into the atmosphere to the deep-sea vents of the oceans."
生物圈: 地球表面维持生命体的相当薄的一层,范围从进入大气层几公里延伸到深海底部。
16.
creatures that populate the ocean depths.
生活于大洋洋底的生物
17.
The light carbon was tied up in layers of clay, which would have trapped organic particles when they settled to the bottom of an ocean.
这些轻碳固定于层层黏土之中，黏土应该接住不少向下沉入海底的生物微粒。
18.
Benthos The organisms that live on the bottom sediments of freshwater and marine ecosystems. They include plants and algae (phytobenthos) that grow below low tide mark.
底栖生物（海底生物）：在淡水或海洋生态系统底部生活的生物体。包括一些水底的植物和藻类。