A protective covering,usually of organic matter such as leaves,straw,or peat,placed around plants to prevent the evaporation of moisture,the freezing of roots,and the growth of weeds.

• 覆盖层放在植物周围以防止水份蒸发、根被冻坏和野草生长的保护性覆盖物，通常由有机物质构成，如树叶、草或泥炭等