layer of rods and cones视: look at杆: shaft; rod; bar锥: awl awl-shaped things层: I storey; tier; stratum进行性视杆视锥变性: progressive rod-cone degeneration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:视杆视锥层，即可在微信中查询翻译
