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1、back up
支持，证实（某种说法）
Radio signals received from the galaxy's centre back up the black hole theory.
从该星系中心收到的无线电信号证实了黑洞理论。
Her views are backed up by a 1989 Home Office report on crime.
1989年内政部的一份犯罪报告印证了她的观点。
备份（文件）
Make a point of backing up your files at regular intervals.
一定要定期备份文件。
I get so annoyed when I lose work because I've forgotten to back it up.
当我因为忘了备份把完成的工作弄丢时，真是懊恼极了。
将…付诸实施
The Secretary General says the declaration must now be backed up by concrete and effective actions.
秘书长说现在必须将宣言付诸具体有效的行动。
It is time the Government backed up its advert campaigns with tougher measures.
是政府采取更严厉的措施来兑现其宣传承诺的时候了。
2、connection
关系;联系
There was no evidence of a connection between BSE and the brain diseases recently confirmed in cats.
没有证据表明疯牛病与最近确诊的猫类脑病有关联。
The police say he had no connection with the security forces.
警方说他与安全部队没有关系。
(电线或管道的)连接部分，接头
Check all radiators for small leaks, especially round pipework connections.
检查所有的暖气片，看有没有小裂缝，尤其是管道连接处附近。
关于;与…有关
I am writing in connection with Michael Shower's letter.
关于迈克尔·肖尔的来信，现复信如下。
13 men have been questioned in connection with the murder.
有13名男子因谋杀案受到盘问。
