所以在周三，我只加入了左括号，右括号。

So on Wednesday I just put open parenthesis, closed parenthesis.

youdao

我们强烈建议每人只加入一个小组，最多不超过两个。

We strongly recommend volunteers only join one Volunteer Team, and no more than two.

youdao

这个网站为灾区捐助了吗？还是只加入了呼吁捐助的行列？

Has this site made some donation or just joined the call for donation?

youdao

So on Wednesday I just put open parenthesis, closed parenthesis.

所以在周三，我只加入了左括号，右括号。

哈佛公开课 - 计算机科学课程节选