例句:They probably over-estimate the appeal of slow-growing Western markets.
他们大概高估了增长缓慢的西方市场的吸引力。 

2.keep up 保持

例句:She shook her head and started to walk on. He kept up with her.
她摇了摇头开始往前走。他跟了上去。

3.bulk up 胀大；蓬松

例句:Holyfield has bulked up to 210 pounds using weights.
霍利菲尔德体重增到了210磅。

4.check out 检查；结账离开

例句:They packed and checked out of the hotel.
他们收拾好东西，办理了退房手续。