To crack a joke, means to tell a joke.

“To crack a joke”意思是开玩笑。

Mischievous, you know, tearaways, and always cracking a joke.

爱恶搞啦，鲁莽啦，笑点不断啦。

Maybe crack a joke to make a mundane topic fun, like that one Southwest Airlines flight safety presentation.

可以讲个笑话，让一个平凡的话题变得有趣起来，比如西南航空公司的飞行安全报告那样。

They liked to crack a joke, to play a joke on each other.

他们喜欢说笑话来开对方的玩笑。

But one of the things that he did and I think at the suggestion of the group was to crack a joke early.

但他所做的其中一件事，我认为是在小组的建议下，早点开个玩笑。

They managed to capture the moment right when Henry cracked a joke, a candid, genuine photo, completely caught up in each other, Henry's arm around him and his own hand reaching up to grasp for Henry's on his shoulder.

他们成功地捕捉到了亨利讲笑话的那一刻，一张坦诚、真实的照片， 他们完全陷入了对方，亨利的手臂搂着他， 他自己的手伸出去抓住亨利肩膀上的手。