A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.
一近视眼
理疗器,它有作为物镜
凸透镜、镜筒、目镜,还有头套和透镜组,它用于
们在近距离上长时间用眼时戴在眼上,可以使被视物
像清楚、放大和变远。
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And the researchers argued that it was this fierce competition for mates that was behind the evolution of so much headgear diversity, and strange head and neck morphologies across the 20-or-so million year history of the group.
研究人员认为,正是这种激烈的配偶竞争导致了该群体在 20 亿年左右的历史中进化出如此多的头饰多样性以及奇怪的头部颈部形态。