tangent circle相: looks; appearance切: correspond to; be close to圆: round; circular; spherical相切: contact; contingency; graze; grazing; intersecting; tangency; tangential; touch切圆: circle of contact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:相切圆，即可在微信中查询翻译
