讲解：
haggle (with sb) (over sth)
争论；(尤指)讲价:
I left him in the market haggling over the price of a shirt.
我扔下他自己在市场上就一件衬衫讨价还价。

convince sb to do
说服,劝说(某人做某事):
I've been trying to convince him to see a doctor.
我一直劝他去看病。

set your sights on sth / on doing sth
以…为奋斗目标；决心做到:
She's set her sights on getting into Harvard.
她决心要上哈佛大学。

equivalent (to sth)
(价值、数量、意义、重要性等)相等的,相同的:
Eight kilometres is roughly equivalent to five miles.
八公里约等于五英里。

dare sb to do
激(某人做某事)；问(某人)有没有胆量(做某事)；谅(某人)没胆量(做某事):
Some of the older boys had dared him to do it.
几个大男孩激他,问他敢不敢干这事。