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abbr. water hammer eliminator 水锤（击）作用消除器
🗣️ 情景例句
We'll call in a couple of days.
我们两三天后打电话。
They lived in perfect harmony.
他们相处得十分和睦。
I meant to tell you yesterday, but you were not in your office.
我原想昨天告诉你的，但你没在办公室。