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.
一种防治近视的理疗器,它有作为物
的凸透
、
、目
,还有头套和透
组,它用于
们
近距离
长时间用
时戴
,可以使被视物的像清楚、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 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。