Bidesyl
联二苯乙酮基
🗣️ 情景例句
I'm experienced in IBM-PC and Great Wall computers.
我熟悉IBM-PC和长城电脑。
We're looking for a house to rent for the summer.
我们正在寻找一幢夏天租的房子。
What happened before printing was invented?
印刷术发明以前是怎么一回事？