“have a short fuse”别理解成“保险丝很短”，真实含义是十分易怒；容易发怒；动辄发火。

【例句】
He is really a good egg. If only he didn't have such a short fuse.
他的确是个好人，如果他不那么容易发怒就好了。

Your father’s having trouble at work, so his temper’s on a short fuse today.
你爸爸工作上遇到问题，所以他今天十分易怒。