Seim
abbr. simple effective index method 简单有效折射率法
🗣️ 情景例句
I want to cash this check, please.
我想把这张支票换成现金。
Do you often work for Mr.stone during the holidays?
你常常在假日期间为斯通先生工作吗？
He is ill in bed.
他卧病在床。