brush up one's act

I was dawdling about the stage entrance, hoping vaguely for a casual brush with one of the butterflies, when an open truck pulls up to the sidewalk.

我正在舞台入口处闲荡，希冀同某个女演员不期而遇，这时一部敞开的卡车在人行道上停住了。

In more than one film, Rahul has seen a man with a spade dig a cavernous grave in secluded woods, bury a body and brush leaves over the evidence, all in a single night before the sun comes up.

在不止一部电影当中，拉胡尔都看到过这样的镜头：一名男子，手握铁锹，在一处幽僻的森林里挖一个又大又深的坟墓，埋下一具尸体，再扫拂一些树叶来掩盖痕迹。这一切都在一夜之间、日出之前搞定。

I will write again, it will describe, but, if one day, I picked up a brush, but I don't know how to paint your face.

我都会将再次执笔，将它抒写，只是，怕有一天，我拿起画笔时，却不知该怎样绘画你的容颜。