用spark off表达“引起，引发”

动词短语 spark off 意思是引起，引发。

• Their decision sparked off a protest because people were very angry.
• If I comment on my girlfriend‘s new haircut it might spark off an argument.

这个词也可以用来形容引起人们积极的活动。

• The documentary sparked off an interest in astronomy.

值得注意的是，spark off 这个动词短语也经常以被动语态出现。

• The interest in the magic coin was sparked off by a demonstration of the game at a technology conference.
• The argument was sparked off by his comment about Mary‘s haircut.