This is the first year my little sister is even allowed to stay up till midnight, and she's ten already.

今年是我妹妹被允许玩到凌晨的第一年，她已经十岁了。

youdao

I am happy with that. But I did not really get a good sleep last night, worrying about my younger sister on the way home alone by train at midnight.

哇，真的很难想象自己能有机会和他们在一起探讨问题，真的是好崇拜他们！

youdao