This optimal strategy is quite complex and varies with the frame and the search costs.

最好的策略非常复杂，而且将根据价格设计和搜索成本的不同而改变。

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The ability to introduce and handle complex elements within the frame of an image and still produce an effective composition requires a maturation of seeing that takes time to develop.

在图像中加入和处理复杂要素并仍然能产生有吸引力的构图，具备这样的能力需要成熟的观察力，这种观察力需要花时间去培养。

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Typically there is no need to have an extra style sheet for a frame if the output format is less complex than HTML, such as WML.

如果输出格式没有HTML那样复杂(例如WML)，则通常没有必要对框架使用额外的样式表。

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