The optimum design of the controller of compound active noise cancellation earmuff is discussed.探讨了复合式有源消声耳罩的控制器的优化设计方法.We need at least 24 hours' notice of cancellation.如欲取消，请至少提前24小时告知。The cancellation of the foot...
Columbia recently resigned the band for a cool $30 million.哥伦比亚唱片公司最近以3,000万美元的高价再次签下这个乐队。She had earlier resigned her post as President Menem's assistant.她早些时候辞去了梅内姆总统助理一职。He resigned from his post as Bishop when t...
溴化氢加成的最后一步,是负离子亲核试剂的附加.The addition of hydrogen bromide involves the attachment of an anionic nucleophile in the final step.关于加成的定向问题,可以一直追溯到自由基化学的起源.The problem of orientation of addition goes right back to the beginnin...