Selection system
[计] 选择系统
🧩 词语组成解析
🗣️ 情景例句
your doing this for Michelle and her friends.
你为 Michelle和她的朋友所做的这些。
When I had a rest, what were you doing?
当我休息时，你在做什么？
In the pioneering days, however, this was not the case at all.
然而，在登山运动的初期，全然不是这种情况。