我去卫生间一下。
wǒqù wèishēng jiān yīxià 。
I will go to the bathroom for a moment.
这家餐馆的卫生间很干净。
zhè jiā cānguǎn de wèishēng jiān hěn gānjìng 。
The bathroom in this restaurant is very clean.
卫生间在楼上的右边。
wèishēng jiān zài lóushàng de yòubiān 。
The bathroom is on the right side upstairs.