Obviously, any child who receives dedicated teaching over an extended period is likely to improve.

很明显，任何接受了很长时期用心教导的儿童都可能会进步。

《柯林斯英汉双解大词典》

You may ask yourself why that would matter, since if it tracks its index properly each day, it should work over any extended period of time.

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Consideration with regard to any candidate is deliberate, held in strict confidence and always takes place over an extended period of time.

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