Seim
abbr. simple effective index method 简单有效折射率法
🗣️ 情景例句
My account number is ...
我户头号码是…
Please do now hesitate to as any questions.
如有问题您可随时提出来。
Yes, we have done a little. But we have just started and have nothing to show you.
有，我们做了一些，但是因为我们才刚起步，并没有任何资料可以提供给你们。