1.smile at 对…微笑， 以微笑对待

Smile at someone you don't know.
对你不认识的人微笑。

Did you ever smile at your opponents?
你有跟对手微笑过吗?

2.begin to 开始

Within minutes brain cells begin to die.
几分钟后脑细胞开始死亡。

Nobody wants to watch your science projects blossom mold or begin to stink up the communal space.
没有人想看着你的科研项目绽放“霉菌”，也没人想看到它们把整个公共空间搞得臭气熏天。

3.wait for 等待

So the bus need not wait for the fare.
所以，公交车不必为了收费而等待。

It's okay to ask for a coach rather than wait for someone to offer you one.
除了等待公司安排，员工也可以主动要求培训。

4.seem to 似乎

The problem doesn't seem to be price.
价格似乎并不是问题所在。

Europe's troubles seem to be costing them business.
欧洲危机看来正在影响到当地的业务。