A sequence of values indicating positive or negative direction in time, years, months, days, hours, minutes, and seconds.

表示时间正向或逆向的一组值：年、月、日、时、分和秒。

youdao

But this requires time, years, even decades.

但这需要时间，也许几年甚至几十年。

youdao

But this requires time, years, even decades.

但这需要时间，也许几年甚至几十年。

youdao