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[医] 导管, 通路
🗣️ 情景例句
Is it all right if I use a letter of credit?
如果我使用信用证，没关系吧？
I asked him to paint it for me, but he wouldn't
我请他帮我油漆，但是他不肯。
As it was extremely heavy, he dumped it on the counter.
布袋很沉，他重重地把布袋扔在柜台上。