1.dosage n.劑量(the giving of a dose)

詞根記憶：來自dose(v.給藥;給…服藥)

例：a dosage of a prescribed drug一劑處方藥

同根詞：dosimetry(n.劑量學)

2.dose n.（藥的）劑量（measured quantity of medicine）；一服(an amount of something likened to a prescription)

例：The medicine costs less per dose than that one.

派生詞：dosage(n.劑，劑量)

3.dough n．生面團(a mixture that consists essentially of flour or meal and a liquid and is stiff enough to knead or roll)

聯(lián)想記憶：硬硬的(tough)的生面團(dough)

例：bread dough生面團

4.downplay v.貶低，不予重視(to de-emphasize)

例：The individualist feminist tradition downplays the importance of gender roles.

5.downstream ad.顧流而下，朝下游方向(in the direction of or towards the mouth of a stream)

詞根記憶：down(向下的)+stream(溪，流)--順流而下

例：The leaf fell off the tree and floated dovmstream.

6.drab a．土褐色的(of a dull light brown)

詞根記憶：和grab(v.奪取)一起記

7.draft n.草稿，草案（preliminary written version of sth.）；匯票(written order to a bank to pay money to sb.)

例：When Elizabeth Cady Stanton drafted the Declaration of Sentiments that was adopted at the Seneca Falls Women's Rights Convention in 1848, she included in it a call for female entranchisement.

8.drainage n.排水(the act or method of drawing off)；排水系統(tǒng)(a system of drains)；污水(sth. drained off)

詞根記憶：drain（排水）+age(名詞后綴)一排水

例：Changes in land use and drainage patterns around the lake mean that the lake's waters are increasingly likely to be affected by agricultural runoff.

9.dramatize V.（使）姑呃鋤化(to present or represent in a dramatic manner)

詞根記憶：drama(戲劇)+tize--戲劇化

例：The television movie dramatized the historical event.

10.drastic a．激烈的，劇烈的(severe)

例：Desertification(沙漠化)is not always the result of drastic climate changes alone.

派生詞：drastically(ad.激烈地；徹底地)