凸球镜片;火镜;凸透镜;凸镜;

结论配戴低度凸透镜可降低小学生近视的发生率.
来源:互联网摘选A convex lens causes rays to converge on a single point, the focal point.
会聚透镜使光线会聚于一点, 即焦点.
来源:互联网摘选Wearing lower degree convex lens can reduce incidence rate of myopia in primary school students.
配戴低度凸透镜可降低小学生近视的发生率.
来源:互联网摘选Two kinds of convex lens which make parallel rays converge to the focal point are given.
本文给出两种能使平行光严格聚焦于一点的凸透镜.
来源:互联网摘选Methods Hypermetropia and myopia were induced by convex lens in front of eyes of 32 subjects.
方法在正常眼前放置正、负球镜,人工诱导单纯性远视、近视性屈光参差.
来源:互联网摘选
简答网 · 高考英语

简答网 · 高考英语

简答网 · 高考英语

简答网 · 双语娱乐资讯

简答网 · 高考英语
简答网 · 双语娱乐资讯