[不知所云] cross
Wolfram http://mathworld.wolfram.com/CrossProduct.html
What do you get when you cross an elephant with a grape?
大象和葡萄交配(叉積)的結果是什麼?
|elephant|*|grape|*sin(θ)
What do you get when you cross a mountain climber and a mosquito?
攀山者和蚊子交配(叉積)的結果是什麼?
Nothing, because you can't cross a scaler (scalar) and a vector.
什麼都不是,因為登高者(數量)和吸血蟲(向量)不能交配(以叉積處理)
有宅到吧? XG
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降子有沒好些? XD
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