等效焓降法计算汽轮机组效率相对变化量时，需选择变化基准。
In calculating the relative change of efficiency for steam turbines, it is essential to select the right change reference.
事务处理，如此提高速度和效率事务处理相对更加劳动密集型的选择。
Transactions, thus raising the speed and efficiency transactions relative to more labor-intensive alternatives.
由与叶面积显著相关的多个性状组成的选择指数，选择的相对效率最高。
The selection index made up of several properties and conditions remarkably correlative with the leaf area has the highest relative efficiency of selection.
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