如果不及时治疗，蛀牙会越来越深。

If left untreated, decay goes deeper and deeper into the tooth.

youdao

通过高效的蒸汽泵驱动，发动机将矿井中的水排出，这使得矿井可以变得越来越深。

The engine eliminated water in the mines by driving efficient pumps, which made possible deeper and deeper mining.

youdao

这讨论越来越深奥，使我难以理解。

This discussion's getting too deep for me.

《牛津词典》

Then you get successively deeper, II through IV, slow, irregular, high amplitude delta waves, and then once you reach stage IV you start going up again, up through stage III and II.

然后睡得越来越深，从第二到第四阶段，慢，不规则，高振幅的δ波，等你到达第四阶段，你又开始返回，第三阶段和第二阶段。

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