请保持教室清洁，不要把垃圾扔在地上。

Qǐng bǎochí jiàoshì qīngjié, bú yào bǎ lājī rēng zài dìshàng.

Please keep the classroom clean and don’t throw trash on the floor.

为了保护环境，我们应该多使用清洁能源。

Wèile bǎohù huánjìng, wǒmen yīnggāi duō shǐyòng qīngjié néngyuán.

To protect the environment, we should use more clean energy.

这款清洁产品没有刺激性气味，适合家里有小孩的家庭。

Zhè kuǎn qīngjié chǎnpǐn méiyǒu cìjīxìng qìwèi, shìhé jiālǐ yǒu xiǎohái de jiātíng.

This cleaning product has no irritating smell and is suitable for families with children.