Angular keeps checking for changes that could affect data bindings.

Angular会继续检查哪些能影响数据绑定的变更。

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One day after Mitt Romney's speech on faith, the other Republican presidential candidates are checking the political landscape for changes.

NPR: Romney Seeks to Put the Mormon Question to Rest

Checking those swathes of fine print for unannounced changes every time you return to those sites, on the other hand, is an impossible one.

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That allows an e-commerce firm to monitor and modify campaigns as they are running, tuning them for the best results, checking the results and making more changes.

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