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易于编辑和自定义 100％完全可编辑的PowerPoint幻灯片 每个版本的明暗版本 2长宽比（4：3＆16：9）
Some of our important choices have a time line. If we delay a decision, the opportunity is gone forever. Sometimes our doubts keep us from making a choice that involves change. Thus an opportunity may be missed. - James E. Faust
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