Moo-cow' is a child's term.

“哞哞牛”是孩子的叫法。

The cow says "moo-moo."

奶牛“哞哞”叫。

But I forced myself to acknowledge the fact that every time I ate a hamburger, a cow had ceased to breathe and moo and walk around.

但我强迫我自己每当我吃汉堡时要明了这个事实，就是，一只牛已经为此停止呼吸，不能再叫与走路了。

A cow is eating. Eating, eating. Moo!

一只牛在吃草，吃啊，吃啊，哞！