I must apologize for the untidy state of the room.

屋子这么洁, 实在抱歉。

I got a slap on the wrist from my secretary today for leaving the office so untidy.

今天我秘书说了我几句，因为我把办公室弄得乱七八糟。

This is an untidy plan.

这是乱无章计划。