frank： [fræŋk] adj. 坦白的，直率的，老实的
He gave her a faint smile of acknowledgment and she stared at him with frankinvitation.
他给了她一个淡淡的认可的微笑，接着她带着直率的邀请盯着他。

explicit [ɪk'splɪsɪt; ek-] adj. 明确的；清楚的；直率的
Through using explicit lyrics and stirring up a media frenzy, this artist has gained fortune andfame!
运用直率的歌词并在媒体上掀起一阵狂热，这位大师赚得了财富和名誉！

confessed [kən'fest]
adj. 坦白的，认罪的；众所公认的，不容怀疑的；公开的，众所周知的
The self-confessed killer has also been banned from reading newspapers or watching broadcast news.
这个公开认罪的犯人同时被禁止阅读报纸或收看电视。

三个词都有“坦率的”意思。frank着重在表达感情时不畏缩、不保留; honest着重指遵守正直、不欺、不贪等道德标准,可用于不同场合; sincere强调出自内心而不加掩饰。

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