讲解：
step up
走上前去:
She stepped up to receive her prize.
她走上前去领奖。

drop sb / sth (off)
中途卸客；中途卸货:
You left your jacket, but I can drop it off on my way to work tomorrow.
你忘了拿你的短上衣,不过我可以在明天上班的路上顺便捎给你。

make sb do sth
迫使；强迫:
They made me repeat the whole story.
他们非让我把整个事件再说一遍。

melt away | ?melt sth away
(使)慢慢消失:
At the first sign of trouble, the crowd melted away.
人群一看有麻烦,便作鸟兽散。

release sth
公开；公布；发布:
Police have released no further details about the accident.
关于这次事故,警方没有透露更多的细节。