| 单词 | 一上一下 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔pump〕He pumped her chest and a minute later the cat showed signs of life.他一上一下用力摁猫胸,1分钟后那只猫苏醒过来。英汉大词典〔time〕She kept time to the rhythm of her sentences with an up-and-down movement of the right arm.她的右臂按着她所念句子的节奏一上一下地挥动。 英汉大词典〔up-and-down〕Characterized by or exhibiting an alternating upward and downward movement.一上一下的：上下的交互运动为特征的或表出现上下的交经运动的美国传统 |
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