rotations
英
[rəʊ'teɪʃnz]
美
[rəʊ'teɪʃnz]
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名词 rotation:
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the act of rotating as if on an axis
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(mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin
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a single complete turn (axial or orbital)
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a planned recurrent sequence (of crops or personnel etc.)
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