在透视投影中观察者的眼睛所在的位置。

The location of the eye of the viewer in a PERSPECTIVE PROJECTION.

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耳朵：位置靠后且低，不能高过眼睛所在的水平线。

Ears set well back and low, not above level of eye.

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耳朵的位置略高与眼睛所在的水平线，并且在脑袋比较靠前的位置。所以当他警惕时，耳朵成为面孔的一部分。

They are set on slightly higher than eye level and rather forward on the skull, so that when the dog is alert they serve to frame the face.

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