我能在半小时内往返一次。

I can go there and back in half an hour.

youdao

从拉萨到雅安的牦牛运输，一年只能往返一次。

Yak conveyance from Lhas to Yaan was only once a year.

youdao

如果稍后再次需要这个文件夹对象，可以从这个缓存获取它，而不是再往返一次去获取它。

Later on, if I need this folder object again, I can get it from this cache rather than making another round trip to get it.

youdao