这意味着在理想的情况下，您仅需要运行选择器一次，并且能够轻松地将所有函数连接在一起，或缓存结果供以后使用。

This means that under ideal situations, you might only need to run the selection once, with the ability to daisy-chain your functions together, or cache the results for future use.

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对于所有其他情况，选择器运行公司A提供的服务。

For all other situations, the selector runs the service that Company a provides.

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选择器可以帮助您解决此类情况。

Such a situation is where selectors can help.

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