In this paper, we use two head models: ovoid head model and sphere head model.

本文采用两种脑模型：卵球脑模型和球脑模型。

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Here, instead of one sphere there are two.

在这里，而不是一个领域，都有两个。

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Here, instead of one sphere there are two.

在这里，而不是一个领域，都有两个。

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