Beug博伊格bev.有；在；是；到达；拜访be subversive of破坏 ... 的be in common use被普遍使用, 通用be infested withv.多得成灾be satisfied for适宜于； 对 ... 是适用的be of no concernprep.没有意义be of service toprep.有助于(对 ... 有用)be claimed to be自称是be rude to sb.对 ... 粗鲁，无礼Bessel ellipsoid贝塞尔椭球be on the strainadj.在紧张