The gravestones were covered with moss so that it was impossible to read the names on them.墓碑上长满了青苔，看不清上面的人名。In the course of the evening he gave me chapter and verse on the mosses of the Islay peat bogs.整个晚上，他向我详细讲述艾莱岛泥炭沼泽地上的各种青苔。The walls were all slimy and green.这些墙布满了青苔，极其黏滑。