keep off grass远离草地；
例如The policeman told the boys to keep off the grass.
Don\'t walk across the lawn; keep off the grass.
不要通过草地，勿踩草地。
The sign reads \"Keep off the grass\".
标牌上写着“勿踏草坪”。
Please keep off the grass.
请不要践踏草地。
水利万物而不争,
而万物莫能与之争。
