很有可能这些波动，二氧化硫的大量增加和减少，一次又一次地发生。

It is quite possible that these fluctuations, the huge increase and decrease of sulfur dioxide, happening again and again.

youdao

不管用什么方法，一个湖泊的水总是在不断地增加和减少：它的水不会只是待在那里，或者待很久。

By whatever means, a lake is constantly gaining water and losing water: its water does not just sit there, or, anyway, not for long.

youdao

根据负载增加和减少使用线程的数量。

Increase and decrease the number of used threads depending on load.

youdao

And he had a press conference, spoke about the increased use of cars, and the decreased amount of carpooling.

他开了一个新闻发布会，说道汽车使用量的增加，和拼车的减少。

麻省理工公开课 - 计算机科学及编程导论课程节选