標示

廁所門上的標示顯示「使用中」的時候，代表有人正在使用。

cèsuǒ mén shàng de biāoshì xiǎnshì shǐyòng zhòng de shíhou dàibiǎo yǒurén zhèngzài shǐyòng

When the sign on the door of a rest room says OCCUPIED, it means someone is using it.