双语例句原声例句
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一个矢量自身相乘的标积等于该矢量大小的平方。
The scalar product of a vector with itself is the square of the magnitude of the vector.
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We learned that a vector is a quantity that has a magnitude and a direction.
我们已经知道矢量是一个,既有大小又有方向的量
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This is the reason behind saying a vector has a magnitude and a direction.
这就是矢量既有大小也有方向的原因
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