Seim
abbr. simple effective index method 简单有效折射率法
🗣️ 情景例句
She has a good figure.
她的身材很好。
She began playing the violin when she was nine.
她从九岁就开始练习小提琴。
The film itself wasn't good but I liked the music.
电影本身不怎么样，但音乐还不错。