Cone of acute vision 明晰视锥角
Because boys generally have more acute vision, learn best through touch, and are physically more active, they need to be given "hands-on" lessons where they are allowed to walk around.
因为男孩一般有更敏锐的视觉，通过触觉学习效果最好，而且身体更活跃，所以需要给他们提供 "实践 "课程，让他们四处走动。
It requires acute vision to be a competent detective.
做一个合格的行侦人员一定要有敏锐的鉴察能力。
With extraordinarily acute vision, "you'd see it expanding and contracting."
用异常敏锐的眼光观察，“你会看到它放大和收缩。”
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