Translation of "Thoroughly" in Chinese

We have to thoroughly investigate it.

我们必须把它彻底检查一下。

We're thoroughly prepared for the Y2K bug.

我們已經準備好應付千年蟲。

They got thoroughly wet in the rain.

他們在雨中被淋得全身都濕了。

His house is cleaned thoroughly once a week.

他的家每周彻底打扫一次。

I thoroughly regretted staying up so late, come morning.

早上，我十分后悔昨天熬夜到那么晚。

- We're thoroughly prepared for the Y2K bug.
- We've already prepared for the millennium bug.

我們已經準備好應付千年蟲。