1. Expression：buck for something

Explanation：To pursue or work toward something. （千方百计地谋求……）

Example：Joe and I are both bucking for the promotion.

乔和我都在争取升职。

I know Amelia is bucking for that award but I heard they're giving it to Jenny.

我知道Amelia在争取那个奖，但我听说他们要把奖颁给Jenny。

I'm just bucking for recognition and of course, a 20 percent raise.

我只是争取得到认可，当然还有20%的加薪。

You can tell by her attention to the boss that she's bucking for promotion.

你可以从他对老板的关注中知道她在千方百计地求晋升。

2. Expression：buck up

Explanation 1：To cheer up; to perk up. （振作起来）

Example：Buck up, honey—I'm sure the interview didn't go as badly as you think.

打起精神来，宝贝，我相信这次面试并不像你想的那么糟。

I tried to buck up my daughter as she fretted over her test scores.

当我女儿为考试分数发愁时，我试图使她振作起来。

Thanks for trying to buck me up but I think I just want to be by myself for a while.

谢谢你尽力让我精神振作起来，但是我觉得我只是想一个人呆一会儿。

She began to buck up when I showed her the results of the tests.

当我把考试结果给她看时，她开始兴奋起来。

Explanation 2：Hurry up. （快点，赶快）

Example：He'll have to buck up if he wants to catch that train.

如果他想赶上那班火车，那么他就得快点。

Buck up! We'll be late if you don't get a move on.

快点！要是你不赶紧，我们就要迟到了。

3. Expression：pass the buck

Explanation：To pass the blame (to someone else); to give the responsibility (to someone else). （推卸责任）

Example：Maybe instead of passing the buck, you should have a think about what you could be doing to improve your performance.

也许，你应该想想以什么来提高你的绩效，而不是推卸责任。

Don't try to pass the buck to me! It's your fault, and everybody knows it.

别想把责任推到我身上！这是你的错，大家都知道。

When I asked my secretary Miss Brown why she hadn't mailed out these very important letters to customers, she passed the buck to our office boy for not having enough stamps ready.

当我问我的秘书，Brown小姐，为何还不把那些至关重要的信件寄给顾客时，她却怪办公室的勤杂员没备足邮票。

I don't know enough about it to decide, so I'll pass the buck to you.

我所知有限，不能决定，所以请全权处理。