打开窗户让新鲜空气进来，驱散房间里的闷浊空气。

Open the window to let fresh air in and get rid of the ___staleness in the room.

这个广告创意因为重复使用太多次而显得缺乏新意。

The advertising campaign lost its impact due to the ___staleness of overused ideas.

长时间坐在办公室里，他开始感到一种精神上的倦怠。

After sitting at the office for hours, he started to feel a mental ___staleness.