1.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。

2.cover with 用…遮盖住，用…填满

Cover with a primer; apply a primer to.
用底漆覆盖；给……涂抹底漆。

Estimation of winter wheat residue cover with hj-1b data.
基于hj-1b数据的冬小麦留茬覆盖度遥感估算。

3.choice for 选择

No, collaboration seems to be the word of choice for management experts and informed ceos alike. "
管理专家和明智的首席执行官都会选择协作，而非竞争。

This is ultimately a choice for the member states.
这是欧盟成员国排在最后的选择。