There was a hierarchical system in neurobiology, and working in invertebrate animals was not looked upon favorably, except in a very special case: the squid giant axon.
神经生物学中有一个等级系统，无脊椎动物的研究不被看好，除了非常特殊的例子：枪乌贼巨大的轴突。
The result had neutral buoyancy, allowing the animal to move (like squid) by jet propulsion.
这样的结构具有中性浮力，使得鹦鹉螺能够靠后推力移动（像枪乌贼一样）。
Squid, also weigh squid, calamary.
鱿鱼，也称柔鱼、枪乌贼。
Squid, also weigh squid, calamary.
鱿鱼，也称柔鱼、枪乌贼。
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