1、 We bought a drawing by an unknown artist、我們買(mǎi)了一幅某個(gè)不出名的畫(huà)家所作的畫(huà)。
2、 An unknown disease suddenly attacked the crops in this area、一種尚未搞清的病蟲(chóng)害突然侵襲了這一帶的莊稼。
3、 The author had been an unknown until he published his recent book、這位作家一直是個(gè)默默無(wú)聞的人，直到最近出版了他的一本書(shū)。
4、 It was unknown country to me、這地區對我說(shuō)來(lái)是陌生的。