这并非儿戏，而是一场硬仗。

This is no game but a serious show of strength.

对她来说，整个计划不过是场儿戏而已。

For her the whole project was just a game.

这家航空公司被指责将乘客安全当儿戏。

The airline was accused of playing Russian roulette with passenger safety.

我们仍然在把战争当儿戏–在空投传单而不是在投炸弹。

We were still playing at war – dropping leaflets instead of bombs.

这是说的这个尽用口头禅，把佛教当儿戏，来随便乱讲乱说，也不负因果的责任。

This is saying that people just pay lip service to Buddhism and treat it as child's play. They talk carelessly without taking responsibility for the cause and effect.