back up 英[bæk ʌp] 美[bæk ʌp] vi. 支援; <籃球>協防，補防; 堵塞; 複製; 往後退; [例句]Radio signals received from the galaxy"s centre back up the black hole theory從該星系中心收到的無線電訊號證實了黑洞理論。

back upna.支援；堵塞；【棒球】搶救後方；【計算機】把(檔案等備份)網路倒退；後退；援助

例句：

1.Radio signals received from the galaxy"s centre back up the black hole theory.

從該星系中心收到的無線電訊號證實了黑洞理論。

2.He"s now back up on the slopes again, skiing competitively in events for the disabled.

他復出了，在殘疾人滑雪比賽中表現不俗。

3.The Secretary General says the declaration must now be backed up by concrete and effective actions

秘書長說現在必須將宣言付諸具體有效的行動。