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.
一种防治近视眼的理疗器,它有作为物的
、
筒、目
,还有头套和
组,它用于
们在近距离
长时间用眼时戴在眼
,
使被视物的像清楚、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和颈部形态。