Earth had experienced previous periods of climatic change, and yet agriculture had not been developed.

地球已经历了先前的气候变化，但农业还没有发展起来。

youdao

Obviously, that's a little bit slower than previous periods, but I'm optimistic.

显然，这个增长速度比以前慢，但是我很乐观。

youdao

In previous periods of warming, for example, many types of animals have displayed reliable trends.

比如，在以前的气候变暖过程中，多种动物都显示出合理的动向。

youdao

During previous periods of inter-Korean tension, North Korea has threatened to close the project.

WSJ: Pyongyang Curbs Access to Kaesong Industrial Park

But the wild swings common in previous periods of currency turbulence have been absent, until now.

ECONOMIST: Fasten your seatbelts | The

In Q3, the company sold 16 da Vinci systems in Japan, significantly higher than the previous periods.

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