【上位】 an event that occurs when something passes from one state or phase to another; "the change was intended to increase sales"; "this storm is certainly a change for the worse"; "the neighborhood had undergone few modifications since his last visit years ago" 何かが1つの状態または段階からもう一つに通過するときに、起こる出来事。
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【上位】 a magnitude or frequency relative to a time unit; "they traveled at a rate of 55 miles per hour"; "the rate of change was faster than expected" 単位時間と比較しての大きさまたは頻度。
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