乐观人士辩称，持股人未必一定会出售股票。他们同时指出，在2007年解除禁售的股票当中，进行交易的尚不足5%。

Optimists argue that it is not inevitable that the holders will sell out, and point out that less than 5 per cent of the shares that were unlocked in 2007 were traded.

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但是，wolfram同时也指出：当wolfram Alpha刚刚发布时，因为在很多知识领域还没有数据，新手用户的用户体验并不足够理想。

Wolfram, however, also acknowledged that right after the launch the user experience for first-time users wasn't necessarily ideal, as Wolfram Alpha didn't yet have data for a lot of knowledge domains.

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本文对此种变化进行分析，同时也指出教材在结构安排上的不足之处。

Now the following will analyses this variety and at the same time we shall point out the deficiency of the arrangement in the textbook's structure.

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