biconvex lens双: two; twin; both; dual凸面镜: convex mirror; convex lens双凸面: bi convex; biconvex凸面镜: conver lens; convex mirror双凸面摆锤: lenticular bob下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:双凸面镜，即可在微信中查询翻译
