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Because the difference in the vector between two times is this vector.
因为两个不同时间点上矢量的差,就是这个矢量 ΔR
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$firstVoiceSent
- 来自原声例句
Because the difference in the vector between two times is this vector.
因为两个不同时间点上矢量的差,就是这个矢量 ΔR
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