(N. Amer. informal)open a book and read it; study
(北美，非正式)研读；学习
open a bottle, especially of wine, and drink it
开瓶（尤指开葡萄酒的酒瓶）喝酒
(Brit. archaic, informal)break into a house
(英，古，非正式)破门而入
a time very early in the morning; daybreak
黎明；拂晓
a thunder peal announcing the Day of Judgement
世界末日的霹雳
(Brit. informal)a chance to try one's hand at or participate in something
(英，非正式)尝试机会；参与机会
individuals who feel that they have not had a fair crack of the whip.
感觉没有公平机会的个人。
[with negative](informal)asserted to be (used to indicate that someone or something has been described too favourably)
(非正式)断定（指对某人某事某物的优点夸大地宣扬）
life on tour is not as glamorous as it's cracked up to be.
旅行生活并不像所吹嘘的那样迷人。
(N. Amer. informal)make jokes
(北美，非正式)开玩笑；说笑话
To act more forcefully to regulate, repress, or restrain
严厉取缔：采取严厉措施来规定、抑制或约束
The police cracked down on speeding.
警察取缔超速行车
(informal)act quickly and energetically
(非正式)积极迅速地行动
most tickets have been snapped up, so get cracking if you want one.
大部分票都被一抢而空了，想要的话得赶快行动了。
(N. Amer.). another way of saying slip through the net (see net)
(北美)。 同 slip through the net （见 net）
(informal)take severe measures against
(非正式)采取严厉措施；严厉打击
we need to crack down hard on workplaces that break safety regulations.
我们必须严惩不守安全规则的工场。
(informal)proceed or progress quickly
(非正式)快速前进；迅速进步
we'll &B{crack on with} the second half of the job this month.
这个月我们要加快下半部分工作的进程。
To praise highly
高度赞扬
He was simply not the genius he was cracked up to be.
他不象人们所赞扬的那样是个天才
To damage or wreck (a vehicle or vessel)
撞车：在事故中撞毁一辆汽车
crack up a plane; crack up a boat.
撞毁了一架飞机；撞沉了一条船
cracked up on the expressway.
在高速公路上撞车了
To have a mental or physical breakdown.
崩溃：在精神上或体力上的崩溃
To experience or cause to experience a great deal of amusement
大笑：经历或使经历极大的快乐
really cracked up when I heard that joke.
听到那个笑话我真想大笑