backed up
英
美
- backed adj.有背的;有支持的动词back的过去式和过去分词形式.
- up adv.向上;起来;上升;往上prep.向上adj.向上的;上行的n.上升v.上升;增加
动词 back up:
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give moral or psychological support, aid, or courage to
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move backwards from a certain position
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establish as valid or genuine
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make a copy of (a computer file) especially for storage in another place as a security copy
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become or cause to become obstructed