on thin ice

汉语翻译

如履薄冰

It is dangerous to walk on thin ice in a lake.
在湖中薄冰上行走是很危险的。
He's used to skating on thin ice and managed the situation as well as could be hoped.
他惯于处理棘手问题，并且十分成功的处理好了当时的局势。
He seemed satisfied with my description of how the machine works, but I was skating on thin ice because I don't really know much about it myself.
他似乎很满意我对机器操作的叙述，可是我却如履薄冰，因为我自己对那机器实在了解不多。