而且只要当你到家时付清余额部分，使用这些还是很便宜的——大多数时间，是这样的。

And so long as you pay off the balance when you return home, they're cheap to use — most of the time, that is.

youdao

而且只要当你到家时付清余额部分，使用这些还是很便宜的——大多数时间，是这样的。

And so long as you pay off the balance when you return home, they're cheap to use - most of the time, that is.

youdao

但是，实际上鉴别这些蛋白是一个花了五年时间的辛勤过程。

But actually identifying the protein was a laborious process that took five years.

youdao

但是，实际上鉴别这些蛋白是一个花了五年时间的辛勤过程。

But actually identifying the protein was a laborious process that took five years.

youdao