Although we had some knowledge of the etiology, gene location, diagnosis and therapy of AD, there are still a lot of unknown field about AD need to be done.

虽然目前有关AD的发病机制、基因定位以及诊断和治疗方面已经取得了很多成就，但仍有许多未知领域有待于进一步探索。

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One question is this: Is it really true that in order to think about the perfectly straight, I must have somehow, somewhere at some point come up against, had direct knowledge of, the perfectly straight?

一个问题是,难道真的说,为了想象一条完美的直线,我必须,在某处直接碰到,并直接了解一条完美的直线吗

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Still, he estimates that 40% of those who looked at the house had some knowledge of green homebuilding.

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Like them, he had some technical knowledge, but delegated most of the technological work to the new engineering class.

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In addition, the agency is investigating whether Binder forged the signatures of some employees who had left the firm, said one person with knowledge of the probe.

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