词组啪 E41 - back sb up (2.23)

知识 四级词汇之每日一词 第552期 2019-02-23 创建 播放:10977

介绍: back sb/sth up: to support sb/sth; to say that what sb says, etc. is true;

Eg: I'll back you up if they don't believe you.

back sb/sth up: to provide support for sb/sth

Eg: The rebels backed up their demands with threats.

back sth up: to prepare a second copy of a file, program, etc. that can be used if t...

介绍: back sb/sth up: to support sb/sth; to say that what sb says, etc. is true;

Eg: I'll back you up if they don't believe you.

back sb/sth up: to provide support for sb/sth

Eg: The rebels backed up their demands with threats.

back sth up: to prepare a second copy of a file, program, etc. that can be used if the main one fails or needs extra support.

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