覆盖: 1.(遮盖) cover; overlap 短语和例子青松覆盖的山峦 hills covered with pinetrees; 地上覆盖着厚厚的积雪。 the ground was covered over with thick snow. 秧苗上面覆盖着塑料薄膜。 the rice seedlings were covered with plastic sheeting
覆盖层厚度: cover thicknesscoverage thicknesscovering depthdepth of coverthickness of overburden