Orthogonal system
[计] 正交系统
🧩 词语组成解析
a. 直角的, 正交的\\nn. 正交直线, 矩形面
🗣️ 情景例句
Just two days.
只要两天。
Don't forget to help him.
不要忘记帮助他。
The best time to come to China is in spring or autumn.
到中国来，最好的时间是在春天或者秋天。