Subpopulation
n. (从其他人口分出或构成总人口的)分组人口
🗣️ 情景例句
I've got extra time on my hands.
我有过多空闲时间。
Please try to be congenial and welcome the guests with a small.
请用笑脸愉快地迎接客人吧。
I know. I can help him with most of his subjects.
我知道。我可以帮助他学习绝大多数科目。