如果我们继续基因改造食物，那就是在玩火。

We're ___playing ___with ___fire if we continue with genetic modification of our food.

别再玩火了，否则第三次世界大战可能以核战争的形式到来。

Stop ___playing ___with ___fire or World War 3 might come in [the] shape of a nuclear war.

他把所有钱都投资在那个风险项目上，简直是在玩火。

He's ___playing ___with ___fire by investing all his money in that risky venture.