I was floored by that question .

我被那个问题难倒了。

His question completely floored me .

他的问题彻底把我难倒了。

This question completely floored him .

这个问题把他完全难倒了。

This thorny problem on the environmental protection floored the new mayor .

这个关于环境保护的棘手难题把新任市长难住了。

The room was floored with boards .

这个房间是用木板铺地的。