Keep a clean environment outside the room, forbidden to throw garbage outside.

不随意丢放垃圾，保持室外清洁的环境，做文明人，做文明事。

youdao

Keep a clean environment outside the room, forbidden to throw garbage outside.

不随意丢放垃圾，保持室外清洁的环境，做文明人，做文明事。

youdao