curtain-falling and inward vision 两目垂帘内视
falling vision
视力下降
以上为机器翻译结果，长、整句建议使用 人工翻译 。
He is following a simple rule: Keep the angle of the falling ball constant in your vision and adjust your running speed accordingly.
WSJ: Matt Ridley on Gut Feelings and the Writings of Gerd Gigerenzer | Mind & Matter
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