有的同学树立了一个写着保护环境的牌子。的翻译：Some students set a write protection of the environment. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Some students set up a sign written to protect the environment.

Some students set a write protection of the environment.

Some schoolmates set up one to write the protection environment sign.

One example is the students write a protection of the environment of a brand.

Some students set a write protection of the environment.