dish plate keel凹: low-lying area; depression形: form; shape平板: dull and stereotyped; flat; ...龙骨: a bird's sternum fossil frag ...内平板龙骨: inner flat keel; inner keel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:凹形平板龙骨，即可在微信中查询翻译
