[量]
(用于重叠、积累的东西, 如楼层、阶层、地层) storey; tier; stratum
a five-storey building
五层大楼
the lowest [highest] tier of society
社会的最低[上]层
(用于可以分项分步的东西) a component part in a sequence; level
What he said has further implications.
他这话还有一层意思。
(用于可以从物体表面揭开或抹去的东西)layer
a thin sheet [layer] of ice
一层薄冰
a coat of paint
一层油漆
(重叠) layer upon layer; multiple