DC air conditioning is simpler to install and more efficient than an AC unit, because you do not need an inverter and the waste of its roughly 85% power conversion effectiveness.

DC冷气系统安装更简单而且比起ac冷气系统更有效，因为你不需要变流器并且也不用浪费大约85%的能量转换效率。

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When they compared the effectiveness of each test in predicting conversion to Alzheimer's disease, two emerged as the best predictors.

当他们比较了每个测试的预测转换为阿尔茨海默病的有效性，二个测试成为最好的预测指标。

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T he effectiveness of interval velocity time-depth conversion processing is mainly dependent on the correctness and rationality of the built velocity model of ti me-depth conversion.

层速度时深转换处理的效果，主要取决于所建立的时深转换速度模型的正确及合理性。

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