1.debris n.碎片，殘骸(the remains of something broken down)

詞根記憶：法語詞，注意該詞的發(fā)音比較特別，末尾的“s”不發(fā)音

例:The excavation revealed a pattern of debris and collapsed buildings.

2.debunk v.揭穿真相;暴露(to expose the falseness of)

例:The new data debunked the theory.

3.decade n.十年，十年期(a period of 10 years)

詞根記憶：deca(十)+de--十年，十年期

例:Over the past decade the technology of microelectronics has evolved rapidly.

4.decay v./n.腐朽(to rot)；衰退(to decline from a prosperous condition)

例:Wood decays rapidly in the humid climate.//radioactive decay放射性衰變

5.decimal n.小數(shù)（fraction expressed in tenths, hundredths, etc.）;a.小數(shù)的,十進(jìn)制的(based on or reckoned in tens or tenths)

詞根記憶：decim(十分之一)+al--將數(shù)分成十分之一--小數(shù)

例:Any decimal that has only a finite number of nonzero digits is a terminating decimal.

6.decimate v.使（數(shù)量）急劇減少(to reduce drastically especially in number)

例:Cholera(霍亂)decimated the population.

7.decipher v.破譯(to decode)

詞根記憶：de(去掉)+cipher(密碼)--破譯

例:The environmental signal can be deciphered by modern physical or chemical means.

decipherable(a．可破譯的)；decipherment(n.破譯;譯文)

8.declension n.衰退(deterioration)

詞根記憶：de+clen(傾斜)+sion--向下傾斜--衰退

例:After gradual dedension down to about 39 hours in 1970, the workweek in the United States has steadily increased.

9.decorate v.裝飾，點(diǎn)綴(to adorn)

詞根記憶：decor(裝飾)+ate--裝飾，點(diǎn)綴

例:Male bowerbirds(澳洲產(chǎn)的一種鳥)construct elaborately decorated nests.

派生詞:decoration（n.裝飾，獎?wù)拢?decorative(a.裝飾性的)；decorator(n.裝飾者)

10.decoration n．裝飾，裝潢(the act or process of decorating)；裝飾品(sth. that adorns, enriches, or beautifies)；獎?wù)?a badge of honor)

詞根記憶：來自decorate(v.裝飾)

例:Much of the local artisans' creative energy was expended on the creation of Buddha images and on construction and decoration of the temples.