back up

v.
1.支持，撑腰
2.倒车
3.证实
4.淤塞

同：	[v.] back, back down, congest, support
反：	[v.] unclog

give moral or psychological support, aid, or courage to
- She supported him during the illness
- Her children always backed her up
[同] back up, support
move backwards from a certain position
- The bully had to back down
[同] back down, back off, back up

开心词场背单词

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