1.step off 走下;跳下
例句:Why had he chosen to step off the platform and fall beneath the train?
他为什么心甘情愿跳下月台,扑到火车下面去呢?
2.private plane 私人飞机
例句:The mayor of one town was ready to send a private plane to New York to help.
有一个市长准备送一架私人飞机来纽约援助
3.at the time 那时候;当时
例句:At the time I had fully expected to find work before long.
那个时候我还一心盼望不久就可找到工作
。4.lasts forever 永远;天长地久
例句:No problem lasts forever. Storms always give way to the sun.
没有解决不了的问题,暴风雨总会让位于阳光
。