1.
of or relating to arrowworms.
属于或关于箭虫（毛颚动物门箭虫科动物）。
2.
Of, relating to, or belonging to the phylum Chaetognatha.
毛颚类的属于、关于或隶属于毛颚类动物门的
3.
Any of various marine worms of the phylum Chaetognatha, which includes the arrow worms.
毛颚类海虫毛颚类动物门的一种海生虫，包括箭虫
4.
any worm of the Chaetognatha; transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth.
毛颚类动物的蠕虫；透明的海生蠕虫，侧部水平，有尾鳍，嘴巴每侧有可卷曲活动的一排棘刺。
5.
any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae.
多种相关的细长软体小动物，特别是环虫类、毛颚类、线虫类和扁形虫类；也包括许多昆虫的幼虫。
6.
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
7.
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。
8.
comprising all vertebrates with upper and lower jaws.
由所有的有上下颚的脊椎动物组成。
9.
extinct order of jawless vertebrates.
已经灭绝的无颚脊椎动物目。
10.
A jawlike appendage of an arthropod.
颚形附器节肢动物的一个口部附肢
11.
The roof of the mouth in vertebrates having a complete or partial separation of the oral and nasal cavities and consisting of the hard palate and the soft palate.
颚脊椎动物口腔的顶，由全部或部分分开的口腔和鼻腔的各结构组成并由硬颚和软颚组成
12.
primitive jawless aquatic vertebrate: lampreys; hagfishes.
原始的无颚脊椎动物；七鳃鳗；八目鳗类鱼。
13.
Either of two laterally moving appendages situated behind the mandibles in insects and most other arthropods.
（昆虫的）下颚骨位于昆虫和大多数其他节肢动物上颚后面的附属活动器官
14.
The mouth, stomach, jaws, or gullet of a voracious animal, especially a carnivore.
食管贪食动物，特别是食肉动物的口腔、胃、颚或咽喉
15.
extinct fishlike jawless vertebrate having a heavily armored body; of the Paleozoic.
已经灭绝的长有很重披甲的鱼形无颚动物；古生代的生物。
16.
The width of the space between the open jaws or mandibles of a vertebrate.
宽度脊椎动物张开的颔骨或下颚之间空间的宽度
17.
Yet the animal that had once wielded these jaws was not a dinosaur. It was a colossal crocodilian.
然而，曾经拥有这种下颚的动物不是恐龙，而是一种巨大的鳄鱼。
18.
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。