Seim
abbr. simple effective index method 簡單有效折射率法
??? 情景例句
Okay, I know just what you mean.
嗯，我明白你的意思。
My name is Thomas.
我叫湯姆斯。
It was true that he had just bought a lamb, he explained, but his lamb was black.
不錯，他的確剛買了一只羔羊，阿列科解釋說，但他的羔羊是黑色的。