1 sentence

1. 所有乘客在登船时都必须穿上救生衣。

   suǒ​yǒu chéng​kè zài dēng chuán shí dōu bì​xū chuān​shang jiù​shēng​yī.

   All passengers must wear life jackets when boarding the ship.

   Source: Dong Chinese Dictionary