In U. S., before the atomic clocks become prevalent a few years ago, there's no way to know the exact time.

但在美国，就在几年前，原子钟还没流行起来的时候，你是没办法知道精确时间的。

youdao

In U. S., before the atomic clocks become prevalent a few years ago, there's no way to know the exact time.

但在美国，就在几年前，原子钟还没流行起来的时候，你是没办法知道精确时间的。

youdao