emarginate凹: low-lying area; depression缘: reason的: 4次方是 The fourth power of 2 i ...凹缘的,凹缘杵形的: marginate-depressed凹缘: concave margin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:凹缘的，即可在微信中查询翻译
