several critical engagements
definitions
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A series of decisive battles or military confrontations that significantly influence the outcome of a conflict.zh: 几次决定性战斗
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A number of highly important meetings, appointments, or social commitments.zh: 几次重要的约会
examples
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His youthful energy and courage turned the tide of several critical engagements.
他年轻的活力和勇气扭转了几次决定性战斗的局势。
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The CEO had several critical engagements scheduled throughout the day.
首席执行官在全天安排了几次重要的会议。