plano concave lens 球平面凹透镜 ; 平凹透镜
concave lens 凹球镜片
double concave lens [光] 双凹透镜
convex-concave lens [光] 凸凹透镜
periscopic concave lens 周视凹透镜
cylindrical concave lens 柱面凹透镜
concave preset lens 前置凹面镜
concave meniscus lens 弯月凹透镜
thin convex-concave lens 薄凸凹透镜
Water surges from the cells on the inside of the leaf to those on the outside, causing the leaf to rapidly flip in shape from convex to concave, like a soft contact lens.
水从叶子内部的细胞涌向外面的细胞，导致叶子迅速地从凸向凹翻转，就像一片柔软的隐形眼镜。
Just as a double convex lens enlarges so a double concave lens reduces.
正象双凸透镜可以放大那样，双凹透镜也可以缩小。
Objective: to observe the effect of concave and convex on growing and the refractive developing of guinea pig eyes and to establish lens-induced animal model of myopia or hyperopia.
目的：观察凹透镜和凸透镜对豚鼠眼球生长和屈光变化的影响，建立透镜诱导型屈光不正动物模型。
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