For extra bases (no, not really) adjust the "Angle of Descent" to see how a little curve becomes a big one in your peripheral vision.

对于额外基地(没有，不真正地)调整“下降角”看小的曲线怎么成为一个在您的周边视觉。

youdao

Or if you need vision correction, you might get an extra pair of prescription eyeglasses.

如果你需要校正视力，你可能需要一副有度数的眼睛。

youdao

But was an extra photopigment all that was needed to evolve trichromatic vision? Or does seeing the world in all its colourful splendour require extra brain power too?

但是是否另一种感光色素必须完全进化成三色视觉？或者要看到世界所有颜色需要特别的脑部功能？

youdao

Under the Merida Initiative, the United States will provide extra kit (such as night-vision gear and metal detectors) and training.

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