1.duplicate a.復制的(being the same as another);n.復制品(an additional copy of something already in a collection)a.復制的(to makea copy of);重復(to do again often needlessly)

詞根記憶：du+plic(重疊)+ate一使重疊--復制

例：Cyprus（塞浦路斯）would become the primary source of marketable duplicate artifacts.//The secretar}t dupkcated the documents for her boss.

派生詞：duplication(n.副本；復制)

2.duplication n.復制(the act or process of duplicating)；副本(counterpart)

例：This priority might often lead them to be less vigilant in streamlining their services-eliminating duplication between departments, for instance.

3.durability n.經久，耐久性(existing for a long time without significant deterioration)

詞根記憶：dur(持續)+ability(能力)--持續的能力--耐久性

例：Nylons have the virtue of durability.

4.duration n.持續，持久(continuance in time)

詞根記憶：dur(持續)+ation(表狀態)--持續，持久

例：The brightening of such a star is observed to be of shorter duration than the brightening of neighboring stars.

同根詞：endurance(n.忍耐力;持久)

5.dwarf n.矮子(a person of unusually small stature);v.（使）變矮小(to cause to appear smaller or to seem inferior)

聯想記憶：戰爭(war)使戰敗國在戰勝國面前相形見絀(dwarf)

例：white dwarf star白矮星//The giant oak dwarfed the seedling.

6.dwelling n.住處，寓所(residence)

詞根記憶：來自dwell(v.居住)

例：For protection from the summer sun, the Mojave lived in open-sided, flat-topped dwellings.

7.dwindle v.變小(to diminish, to shrink, to decrease)

聯想記憶：d+wind(風)+le--隨風而去越來越小--變小

注意：不要和swindle(v.欺騙，詐騙)相混

例：Contrary to financial analysts' predictions last year that the market for home computers would dwindle, the personal computer industry continued to show strong growth in the first quarter of this year.

8.dye n．染料(a substance used to color materials);v.給…染色(to color,especially by soaking in a coloring solution)

例：Dyes can be made from plants or from chemicals.//Each of the eggs in the bowl is dyed red, green, or blue.

9.dynamic n.動力(an underlying cause of change or growth);[常pl.]動態(a pattern or process of change, growth, or activity)

詞根記憶：dynam(力量)+ic--有力量的--動力：動態

例：market dynamics市場活力//population dynamics人口動態

同根詞：dynamo(發電機)；dynamite(炸藥)

10.ease v.緩和(to alleviate)；n.不費力（effortlessness）

例：The drugs eased my pain.//She picked up her second gold medal with ridiculous ease.

派生詞：easing(n.放松)