up-down

基本解释

• adj.陞降

同根派生

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英汉例句

用作形容詞 (adj.)

• Window cleaners are pulled up and down tall buildings on cradles.
  窗戶清潔工乘坐能陞降的吊籃清洗高層建築物的窗子。
• The Looper Thread Take-up can make it up and down for threading easy.
  陞降式底線分線磐，使穿線更容易。

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