a cushion of moss

• 一层青苔

a cushion of moss的用法和样例：

例句

1. The stones are covered with green moss.
   石头上长满了青苔。
2. If you don't plough and till it, time will quietly propagate moss, which will grow throughout the yard of your life and bury you all your life.
   时间，你不开拓它，它就悄悄长出青苔，爬上你生命的庭院，把你一生掩埋。