英语语法分析

The objective is to observe the distribution of nerves containing neuropeptide Y in cloaca wall of Alligator sinensis.

目的是观察含神经肽 Y 在扬子鳄泄殖腔壁内的分布情况。

People who produce lower amounts of the brain molecule neuropeptide Y (NPY) were at a higher risk of severe depression.

能产生少量脑分子神经肽(npy)的人，是忧郁症高发人群。

As people grow older, an enzyme known as pep increasingly breaks down the neuropeptide chemicals involved in learning and memory.

题目随着人们日渐衰老，一种被称为PEP的酶会不断地分解学习与记忆过程中所涉及到的神经肽化学物。