Only in this mountain, the clouds deep know.

只在此山中，云深不知处。

youdao

You know they are near when you hear the strange deep noise they make with their nose.

VOA: special.2009.08.19

When people say,You know,everyone dies alone, you're supposed to be gaining some deep insight into the nature of death.

当人们说，每个人都孤独而死，这应该让你得到对死亡本质的深刻认识。

耶鲁公开课 - 死亡课程节选

"I've always been a devotee of slapstick, and it sort of emphasizes sometimes jokes and you know I think everybody really deep inside would sometime or another would like to throw a pie or get hit with a pie."

VOA: special.2010.10.17

So I put all my deep technological know-how to work: I yelled at it.

FORBES: Restore Yourself to Your Factory Default Settings

"Deep inside my dream is to win a Slam and deep inside I know I can make it, " Monfils said.

WSJ: Monfils Looks Back in Form at the French Open

"The big entrances, the stadiums, that is me and I know deep down I'll be a world champion, " DeGale told BBC Sport.

BBC: Olympic champion DeGale turns pro