Tetragonal system
[化] 四方晶系
🧩 词语组成解析
a. 四角形的
🗣️ 情景例句
I heard the professor of that class is very good.
我听说那个班的教授很好。
We'll talk about it later.
再说啦！
This head must have been found in Classical times and carefully preserved.
她的脑袋一定是在古希腊罗马时代就为人所发现，并受到精心的保护。