incisal embrasure切: correspond to; be close to端: end; extremity外展: abduction; abduce; extented隙: crack; chink; crevice外展: abduction; abduce; [生物学] extented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:切端外展隙，即可在微信中查询翻译
