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

如果不及时治疗，蛀牙会越来越深。

youdao

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

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。

youdao

On he went, without being disheartened, deeper and deeper into the wood, where the most wonderful flowers were growing.

他毫不气馁，继续向树林深处走去，那儿长着最美丽的花。

youdao

We went deeper and deeper into the cellar.

VOA: special.2009.02.07

You could keep producing a sentence deeper and deeper embedded until you die.

你可以不断地嵌入新句子直到你死掉

耶鲁公开课 - 心理学导论课程节选

You're hiding something from yourself, and once you know what's going on to deeper phenomena your problems will go away.

这些冲突被你压抑起来，一旦你理解了更深层次的冲突究竟是什么,你的问题便会得到解决。

耶鲁公开课 - 心理学导论课程节选

He's like a black hole in the screen, drawing us in, deeper and deeper.

CNN: OT ONLY DID HONG

In Cardona's interrogation tape, there are clues that "Los Zetas" are reaching deeper and deeper into the United States.

CNN: Police: U.S. teens were hit men for Mexican cartel

So even if you're lucky enough to have health care, it is digging deeper and deeper into your pocket.

WHITEHOUSE: Help for Homeowners in the Hardest Hit States