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backing up的英文翻譯是什麼意思，詞典釋義與在線翻譯：
英英釋義
動詞 back up:
-
give moral or psychological support, aid, or courage to
-
move backwards from a certain position
-
establish as valid or genuine
-
make a copy of (a computer file) especially for storage in another place as a security copy
-
become or cause to become obstructed
backing up的用法和樣例：
例句
用作名詞 (n.)
- The PQR shall include the composition and flow rate of the shielding and inert gas backing, when used.
焊接工藝評定記錄單上應包括封底焊時所用的惰性保護氣體組成成分和流率。
