Hints: 本期學(xué)習(xí)的字源：deca-=ten十，或作deci-=tenth十分之一 decimal的例句中有破折號(hào) -- San Francisco 單詞不需要大寫，單詞與例句或不同詞條之間換行即可。 注解中詳細(xì)介紹了單詞的拆分與釋義，是學(xué)習(xí)字源分析的重中之重！一定記得聽寫后來看注解！
decade decibel A single crack of gunfire can hit 130 decibels or more, easily exceeding the danger level of 85 decibels. decimal Seconds, minutes, hours and months -- none of these are based on the decimal system. decimate The earthquake of 1989 decimated large stretches of the San Francisco area. decimeter A decimeter equals ten centimeters.
A single crack of gunfire can hit 130 decibels or more, easily exceeding the danger level of 85 decibels. 一聲槍響可以達(dá)到130分貝以上，輕易地超過85分貝的危險(xiǎn)界限。 Seconds, minutes, hours and months, none of these are based on the decimal system. 秒、分、時(shí)、月——沒有一項(xiàng)是采用十進(jìn)位計(jì)算的。 The earthquake of 1989 decimated large stretches of the San Francisco area. 1989年的地震摧毀了舊金山大部分地段。 A decimeter equals ten centimeters. 一分米等于10厘米。