1.
extinct order of jawless vertebrates.
已经灭绝的无颚脊椎动物目。
2.
primitive jawless aquatic vertebrate: lampreys; hagfishes.
原始的无颚脊椎动物；七鳃鳗；八目鳗类鱼。
3.
Any of various mouth organs of invertebrates used for seizing and biting food, especially either of a pair of such organs in insects and other arthropods.
上颚任一无脊椎动物用于啄咬食物的器官，尤指昆虫或其它节肢动物的上颚或下颚
4.
comprising all vertebrates with upper and lower jaws.
由所有的有上下颚的脊椎动物组成。
5.
extinct group of armored jawless fishes or fishlike vertebrate; taxonomy is not clear.
现已灭绝的无颚有甲鱼类或鱼状脊椎动物；其分类尚不明确。
6.
single-host parasites of lower vertebrates and invertebrates.
低等脊椎动物和无脊椎动物的寄生虫。
7.
invertebrate biophysics
无脊椎动物生物物理学
8.
paleobiology of invertebrates
无脊椎动物古生物学
9.
invertebrate neurobiology
无脊椎动物神经生物学
10.
invertebrate bioenergetics
无脊椎动物生物能量学
11.
biology of desert invertebrates
荒漠无脊椎动物生物学
12.
Jaw: Either of two Bones that frame the mouth: a movable lower jaw (mandible) and a fixed upper jaw (maxilla).
颚: 构成脊椎动物嘴的框架的骨骼,包括一个能活动的下颚和固定不动的上颚。
13.
embryonic development of invertebrate
胚胎发育（无脊椎动物）
14.
(of an animal,etc)having no spine
（指动物等）无脊椎的.
15.
Invertebrate Zoology and Experiment
无脊椎动物学及实验
16.
invertebrate functional morphology
无脊椎动物功能形态学
17.
membrane physiology of invertebrates
无脊椎动物膜生理学
18.
terrestrial invertebrate ecology
陆栖无脊椎动物生态学