吃透英语课本,提升在校竞争力
phrase. 人类
复数:human beings
The treatment will be tried out on human beings only after it has been shown to be safe and foolproof in animals.
该疗法只有在动物身上证明安全、万无一失后才会在人体上试用。
Every human being deserves respect.
每个人都应得到尊重。