英语语法分析

They found it hiding behind a rock, and they realized they had found the pika.

他们发现有个小东西藏在石头后面，仔细一看是一只鼠兔，大家都高兴坏了。

Objective To seek the safe and effective method of expelling coccidian of altitude pika.

目的探求一种安全高效的驱治高原鼠兔球虫的方法。

Objective To provide basic means for the exploitation and husbandry of the plateau pika in the northeast.

目的为在东北地区开发饲育高原鼠兔提供基础资料。