单词	凸晶
释义	凸晶convex crystal
随便看	two-lens objective two-lens ocular two-letter code two letter signal two letter signal code two-level address two-level addressing two-level alarm two-level channel two level crossing two-level directory two-level encoding microinstruction two-level formula two-level grammar two-level grid file two-level image two-level laser two-level logic two-level microprogram control two-level midpoint method two-level mold two levels two-level subroutine two-level system two-limit probit model