层 i 量词1.(用于重叠、积累的东西, 如楼层、阶层、地层) storey; tier; stratum 五层大楼 a five-storey building; 社会的最低[上] 层 the lowest [highest] tier of society2.(用于可以分项分步的东西) a component part in a sequence; level 他这话还有一层意思。 what he said has further implications.3.(用于可以从物体表面揭开或抹去的东西) layer 一层薄冰 a thin sheet [layer] of ice; 一层油漆 a coat of paintⅡ形容词、副词(重叠) layer upon layer; multiple
数学 mathematics 他数学方面训练不够。 he was lacking in mathematical training.; 数学归纳法 [数学] complete induction; mathematical induction; 数学家 mathematician; 数学教学 mathematical education; 数学近似 mathematical approach; 数学投影 mathematical projection; 数学作业 arithmetic operation