Quadratic crystal
[医] 四方晶体
🧩 词语组成解析
a. 二次的\\nn. 二次方程式
🗣️ 情景例句
Please keep off the grass.
请勿践踏草地。
The problem is that my boss says he can't keep my job open for me.
可问题是老板说他无法继续保留我的工作。
Even if you travel in ideal weather, sea journeys take a long time.
即使风平浪静，坐船旅行也要占用很长时间。