play with fire 玩火；冒险；铤而走险

【例句】
Warmongers who like to play with fire will be certain to pay an expensive price.
喜欢铤而走险的战争贩子肯定会付出昂贵的代价。

Ask the children not to play with fire. it's very dangerous.
叫孩子们别玩火，那非常危险。