保持校园清洁，请勿乱扔杂物。

Please keep the school clean. Littering will result in fines.

youdao

众所周知，保持校园的清洁干净对我们来说非常重要。

As we all know, it's very important for us to keep our school clean and tidy.

youdao

更重要的是，我们必须保持校园的清洁。因此，我们不能随地扔垃圾。

Whats more, we must keep the schoolyard clean, so we cant throw the rubbish away incidently.

youdao

更重要的是，我们必须保持校园的清洁。因此，我们不能随地扔垃圾。

Whats more, we must keep the schoolyard clean, so we cant throw the rubbish away incidently.

youdao