1. with caution

慎重；留心

eg. But he thinks there's already enough reason to swim with caution.

但是，他认为，已经有足够的理由要求我们游泳要慎重。

eg. This module should be used by system administrators with caution as it provides no real authentication.

系统管理员应该慎用此模块，因为它并没有提供实际的验证。

2. even if

即使；虽然

eg. Even if we cannot slow down every day, at least slow down on Sunday.

即使我们不能每天都慢下来，至少可以在星期天慢下来。

eg. Even if we achieve great success in our work, we should not be conceited.

即使我们在工作中取得了很大的成绩， 也不应该自满。

3. come and go

来来往往，来来去去

eg. You can let her come and go without regarding me. 跟读

您可以让她来来去去，不用管我。

eg. Big anniversaries come and go, but moments like this arise only rarely. 跟读

大型年度庆典来来往往，但像这样的时刻很出现。