Minalpha
锰铜标准电阻丝合金
🗣️ 情景例句
Seeing as you are all so tired, we'll finish this lesson next time.
考虑到现在你们都很累了，这课我们下次接着讲吧。
I didn't know whether to send the letter airmail or not.
我不知道是否送航空邮件。
Is this your first order?
您这是第一次订货吧？