他们中有接近两百万人散布在厄立特里亚，埃塞俄比亚和吉布提(过去被称为法属阿法斯和埃萨斯)。

Up to 2m of them are spread across Eritrea, Ethiopia and Djibouti (previously called the French Territory of Afars and Issas).

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他们散布到与几内亚和塞拉利昂接壤的洛法县和巴波卢县地区。

They have spread into areas of Lofa County and Gbarpolu County, bordering Guinea and Sierra Leone.

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首先，通过重新定义样本的类内散布矩阵和类间散布矩阵，提出了一种新的零空间法。

First, by redefining the within class scatter matrix and the between class scatter matrix, a new null space method was presented.

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