The central nervous system can be divided into three classes of neuromeres.

中枢神经系统可分为三类间体。

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PLATO believed that men are divided into three classes: gold, silver and bronze.

柏拉图认为，人类按其天赋可分为三等：黄金； 白银； 青铜。

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The evalution index system can be divided into three classes efficiency index, cost index and risk. One must well deal with the related prollems when evaluating.

评估指标可以分为效益指标、成本指标和风险指标三大类。

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Until now, the Pentagon has divided foreigners into three classes for the sharing of defence information.

ECONOMIST: European aerospace