口语表达: 你可能不知道they/them/their 的这个用法

口语表达: 你可能不知道they/them/their 也可能是表示一个人

问题: 如果一个学生有问题, Ta应该举手. 

不自然表达: If a student has a question, he or she should raise his/her hand?

e.g. The new hire hasn’t started yet, but I heard they have a lot of experience. 新来的员工还没开始上班，但我听说他经验很丰富。

e.g. If anyone calls, just tell them I’ll call them back later. 如果有人打电话来，就跟他们说我会回拨。

e.g. Every child should bring their own lunch tomorrow. 每个孩子明天都要带自己的午餐。