Lewis structure
[化] 路易斯结构
🧩 词语组成解析
n. 吊楔
🗣️ 情景例句
Haven't I seen you before?
我以前没见过你吗？
I subscribed to a lot of periodicals last year.
去年我订了许多期刊。
One of the boys is English. His name is Jim.
有一个男孩是英国人，他的名字叫吉姆。