常見例句"We see the foundations wearing away, the stone steps crumbling, the unnavigable canals. 他說:“我們眼看著地基逐漸磨損,石頭臺階碎裂,河道也不再通航?!?/li>It is 822 mi (1,323 km) long.It is torrential for most of its course and is unnavigable. 它長約822哩(1,323公里),由于其大部分河段皆湍急洶涌,故難以航行。Corporate Websites: I recently co-judged a competition of nominated best-of-class business websites, and I was aghast at how unnavigable and useless most of them were. 企業(yè)類網(wǎng)站: 近期我參與了一項最佳商業(yè)網(wǎng)站的評委工作,卻驚奇地發(fā)現(xiàn)這些網(wǎng)站中的大多數(shù)都是不能正常運行或者毫無價值的。unnavigable river 不通航河流 返回 unnavigable