然后利用梯度下降法推导了基于最优模式中心的NLDA算法。

The second algorithm calculates the optimum classes' centres of NLDA by method of grads descending.

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而为什么关系数据库模式中心(6)和那么多其他数据库相关的插件被激活了？

So why were the relational database schema center (6) and so many other database-related plug-ins activated?

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美国国家大气研究中心已经表示，向大气中注入硫的提议可能会影响整个热带和南大洋的降雨模式。

The US National Center for Atmospheric Ressearch has already suggested that the proposal to inject ulphur into the atmosphere might affect rainfall patterns across the tropics and the Southern Ocean.

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