块编号；批号
the United States, Internet and email service providers were blocking the worm in record Numbers, while others were getting through to an untold number of unprotected computer users.───美国的网络和邮件服务商正在过虑记录在案的蠕虫病毒，然而有些病毒却躲过阻挡使不计其数的未受保护计算机受到感染。
Subscribers should be allowed call-blocking services, but equally, they should be able to choose whether to accept calls from blocked numbers.───用户应当被允许使用拒收来电服务，但同样地，他们也应能够选择是否接听被阻拦号码的来电。
Mobile networks in the United Arab Emirates have been instructed to start blocking mobile phones that carry invalid serial Numbers in a move aimed at curbing the use of counterfeit phones.───阿拉伯联合酋长国移动网络已经受命开始封锁带有无效序列号的手机，此举旨在抑制假冒手机的使用。
broken numbers───断开的数字
back numbers───n.过期期刊；过时的人（或物）（等于backissue）
blocking factors───区组因素，分组因子
locking pliers───老虎钳；大力钳
octane numbers───[油气]辛烷值
wrong numbers───[通信]错号，错误号码
blocking antibody───抑制性抗体；封闭性抗体