I think he must be cracked, don't you?

我认为他一定是疯了，你说是不是？

《牛津词典》

The hard, woody, outer peel is so hard that it has to be cracked with a hammer.

木质硬壳硬到不得不用锤子才能砸出裂缝。

youdao

Nothing needed to be scratched off—the ticket could be cracked if you knew the secret code.

根本就不需要刮掉任何东西——如果你知道这个秘密，彩票就可以被破解。

youdao

Today,a few blocks up from the Boll Weevil Statue, conveyor belts carry rivers of peanuts to be cracked and ground at the Sessions Company.

VOA: standard.2010.08.10

Just like,with the body view,we wanted to say, Being alive is not all it's cracked up to be, the real question is not,am I alive,on the body view?

从肉体理论上，我们想要说，存活一事并非所想，真正的问题是，肉体理论角度看来，我还活着吗？

耶鲁公开课 - 死亡课程节选

Even though their iPhones were unlocked versions from Hong Kong, and had to be cracked, they were welcomed among many urban Chinese.

FORBES: For Apple, The Best China Strategy Was Not Having One

It brings together information provided by Scotland's police forces to help identify cases that could be cracked through advances in evidence gathering techniques such as DNA profiling.

BBC: Malcolm Webster

In its defence, it says that, with 32m people visiting Macau a year, mainly from China, the problem cannot be cracked without the mainland's help and that has been singularly lacking.

ECONOMIST: Macau: Taking a gamble | The