口语学习技巧|fall back on sth 借用于；依靠，依

fall back on sth

fall back on sth的意思是借用于；依靠，依赖，和live by差不多，形容靠谋生。

As men do not live by bread alone, they do not fight by arms alone.

好似大家并不单靠着面包生活，他们也不单靠着武器来作战。

play up to sb

play up to sb有讨好，巴结的意思，也表示给当配角。

Julia knows how to play up to the supervisors^{1 - she can always get time off work when she wants it.}

朱莉娅了解怎么样讨好上司如此她随时都能请假。