Orthonormal vector
[计] 正交单位向量
🧩 词语组成解析
[计] 规范正交的
🗣️ 情景例句
I wish he felt better.
我真希望他现在好一点。
He is speaking on another phone.
他正在接听别的电话。
He opened it and saw the man from downstairs.
他打开门，看见楼下人。