1. In the darkness, I am almost upon the sturdy cow pen before I see it, and realise it is milking time.
    在黑暗中，我差点撞上了坚固的牛栏，才明白现在正是挤牛奶的时间。

2. I don''t know why the cow is fidgeted and circling in the cattle pen.
    不知道是什么原因，那头牛很烦躁，总是在牛圈里来回转圈儿。

3. The reproductive organs of the dairy cow have the most direct impact on breeding pen performance.
    奶牛的生殖器官对于配种枪的操作有最直接的影响。