Beco贝措
bev.有;在;是;到达;拜访
be calculated toconj.适合
be alluded to asprep.称作
Be sorely needed迫切需要
be fully engaged全被占用
be lost to sight再也看不见了; 消失了
be driven by gas由气体驱动
be beyond remedy无法补救
be welcome to it可以自由地使用它
be under a cursevi.受诅咒
Bessel transform汉克尔变换