短语讲解：

1. Many phrasal verbs have a number of different meanings in different situations.

a number of 一些; 许多的
例句：A number of men were detached to guard the right flank.
派遣了一些士兵守卫右翼。

2. The object of the phrasal verb throw out is jeans.

throw out 扔掉; 不受理
例句：Do not throw out the baby with the bath water .
勿因小失大。

3.  For example, we use get up to mean "to wake oneself up" or "to awaken someone."

get up 站起来; （使） 起床
例句：I used to wake up early and get up at 6:30.
我通常醒得早，六点半钟起床。