basal-contact points底面: soffit; basal plane; plancee ...接触: come into contact with; get ...样: appearance; shape点: drop接触样点法: point contact method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:底面接触样点，即可在微信中查询翻译
