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[建] 鑄塑酚醛塑料
??? 情景例句
Can we help?
我們可以幫忙嗎？
I've never heard that piece before.Who wrote it?
我從來沒聽過那樂章，那是誰寫的？
I have a letter of introduction here.
我這兒有一封介紹信。