alarm n.警報，驚慌，警告器vt. 恐嚇，警告

　　例句：The government is alarmed by the dramatic increase in violent crime.

　　政府對暴力犯罪案件的急劇增加感到恐慌。

　　cautious adj. 謹(jǐn)慎的，小心的

　　例句：Experience of once pain is worth hundreds of thousands of cautions,

　　一次痛苦的經(jīng)驗抵得上無數(shù)次的告誡。

　　reckless adj. 不計后果的

　　例句：Anthony is quite reckless of his own safety.

　　安東尼完全不顧及自己的安全。

　　caution n.小心，.謹(jǐn)慎，警告vt.警告

　　例句：Alan told us to proceed with caution in every step.

　　艾倫要我們每一步都謹(jǐn)慎行事。

　　precaution n.預(yù)防，警幅，防范

　　例句：The report is focusing on the lack of safety precaution.

　　該報道集中在缺乏安全預(yù)防措施一事上。