以下为句子列表：
英文: A web-enabled dashboard presents key performance indicators to help programs stay on track and to validate the resulting return on investment of efficiency projects.
中文: 可与网络连接的仪表板显示关键的绩效指标，帮助程序保持跟踪，确认效率项目投资的最终回报。
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英文: Ideally, you'll continually optimize your campaigns, but you may come to a point where your return on investment levels off and there isn't any tweaking left to do.
中文: 最理想您不断优化你的运动,但你可到有你的投资回报平缓,没有留下任何激发做.
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英文: The point, especially the level of sales of a good or service, at which the return on investment is exactly equal to the amount invested.
中文: 盈亏平衡点尤指在出售货物或服务的水平上，投资的收益与投资的数量恰好相等的一点
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