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变互导管, 变跨导管
🗣️ 情景例句
I've got extra time on my hands.
我有过多空闲时间。
Most of them are less than 30.
他们中大多数不到30岁。
I really enjoy it, but I'm tired of so much reading.
我可喜欢学啦！但要读的东西太多，我很烦。