爬山人士离开时请随手清理留下的垃圾。

Páshān rénshì líkāi shí qǐng suíshǒu qīnglǐ liúxià de lājī.

Hikers, please clean up any trash you leave behind when you go.

你离开时请随手把门关上。

Nǐ líkāi shí qǐng suíshǒu bǎ mén guānshang.

Please close the door behind you when you leave.

做完饭后，记得随手洗碗。

Zuò wán fàn hòu, jìde suíshǒu xǐwǎn.

Remember to wash the dishes after cooking.