balance余额

bar graph（chart）条带图

base堤边，底面，幂或乘方的底数

base area底面积

be across from在……对面

be closet to最接近……

be composed of由构成

be equal to与……相等

be equivalent to anther equation与另一方程痛解

be fewer than小于

be greater than大于

be greater than or equal to不小于

be inscribed in内接于

be less than小于

be less than or equal to不大于

be parallel to平行于

be perpendicular to垂直于

be substituted for代替

billion 

binomial二项式

bisect把……二等分

block立体

blot out涂掉，删掉

bound辩解，范围;邻接

*brand

*bulk大量