| 词汇 | back-up |
| 释义 | back-up noun 1 a person supporting another in a fight AUSTRALIA, 1975. 2 a second helping of food AUSTRALIA, 1929. 3 serial sex between one person and many others, usually consensual AUSTRALIA, 1965. 4 the path from the death cell to the death chamber in prison US, 1992 |
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