第一，情景对话

A: Do you think Tom can remain at the top of the class this time?

你认为汤姆这次还能保特全班第一吗？

B: I believe so. He seems to have a card up his sleeve.

我相信他能。他看起来胸有成竹。

A: All his confidence comes from hardworking.

他的自信源于他的勤奋。

B: Yeah. he's the most diligent student I have ever met.

是啊，他是我见过的最勤奋的学生了。

第二，词海拾贝

have a card up one’s sleeve

Exp. To have a plan or asset that is kept secret until it is needed. （心中有数，胸有成竹）

e.g. She has a card up her sleeve if they ever try to fire her, since she knows about the boss's unscrupulous business practices.

如果他们想解雇她，她有锦囊妙计，因为她知道老板无良的商业行为。

e.g. Bill always has a card up his sleeve, so when his first plan failed he tried another.

比尔经常留有一手, 所以当第一个计划失败后, 他就试行第二个。

第三，词汇积累

at the top of ：在首位，在最高地位，在......的巅峰

e.g. He is at the top of his class.

他是班上数一数二的好学生。

e.g. Mary came out at the top of the class.

玛丽在班上名列前茅。

e.g. Mrs. Atkins is a very vulgar woman to shout like that at the top of her voice.

艾特金太太真没教养，大叫大嚷的。

e.g. He was able to make himself heard only by shouting at the top of his voice.

他要使他自己的声音让别人听见，只有用最大音量喊。