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Small rectangular backup bars were used to fabricate the web - bottom flange connection.在腹板与下翼缘的施焊中使用小矩形挡板.Stop lights, backup lights , and four - way emergency flashers also aid in vehicle safety.停车灯 、 倒车灯和紧急闪烁灯也是有助于车辆安...
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n.支持，后援，阻塞，备份文件，[乐]伴奏adj.备用的，后补的，支持性的，伴奏的...
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Every part of the system has a backup.系统的每个部分都有备用元件。She once sang backup for Madonna.她曾经为麦当娜伴唱.Have you kept a backup of this file?你把这文件备份了 吗 ?...
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backup的音标：backup的英式发音音标为：['bækʌp]backup的美式发音音标为：['bækˌʌp]...