This flashcard teaches the word "rev". As a noun, it refers to engine rotation. As a verb, it means to accelerate, increase activity, or liven up.
此卡片教授单词 "rev" 的用法，意为 "发动机的旋转"，"（使）加速" 或 "（使）活跃起来"。
| 单词 | rev |
|---|---|
| 音标 | [rev] [rɛv] |
| 释义 | n.["<口>发动机的旋转"] vt.& vi.["<口>（使）加速","（数量、活动等）激增","（使发动机）快速旋转","（使）活跃起来"] |
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