[N-MASS 物质名词]青苔;苔藓Moss is a very small soft green plant which grows on damp soil, or on wood or stone.
...ground covered over with moss.
长满青苔的地面
Oxford
moss/mɒs; NAmEmɔːs/noun _plantlabels_plants_comp.jpg _moss.jpg [uncountable , countable ]a very small green or yellow plant without flowers that spreads over damp surfaces, rocks, trees, etc. 苔藓;地衣◆moss-covered walls青苔覆盖的墙壁☞compare