catch是“抓住”，fire是“火”，可catch fire可不是“抓住火”，真正的意思其实是.......
01
catch fire
=着火
例句：
Keep your coat away from the flames, or it will catch fire.
你的外套离火远点，小心着火。
02
come under fire
=遭受批评
例句：
The government has come under fire for its decision to close the mines.
政府因其关闭矿井的决定而遭到了抨击。
03
hold fire
=延缓作决定
例句：
We should hang fire until the general situation becomes
clearer.
我认为我们还是等总体局势更为明朗之后再作决定为好。
04
play with fire
=玩火，冒险
例句：
It's dangerous for children to play with fire.
对孩子们来说玩火是危险的。
Be careful with that knife! You are playing withfire!
小心刀！你这是在冒险。
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