We tell you when to use and when not to use certain properties for best performance results, and where applicable, we provide you with alternative solutions.

为了取得最佳性能，我们将告诉您何时使用某些属性，何时不要使用这些属性，适当的地方我们会提供代替的解决方案。

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For best results, you should use a bitmap with dimensions of 480 pixels wide by 320 pixels high.

为得到最佳效果，应当使用宽度为480像素、高度为320像素的位图。

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Making use of the relations among the direct cost, the indirect cost and the total cost, we get the best time limit for the project with results of the optimal T-C decision-making.

利用直接费用、间接费用与总费用的关系，预测出总费用最低时对应的工期，从而给出了工期一费用的最优决策。

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