1.anaerobic a.厌氧的(occurring, or existing in the absence of oxygen)

词根记忆：an(不，无)+aero(空气)+bic--不要空气的--厌氧的

例:anaerobic metabolism无氧代谢

2.analog(ue) n.类似物(something that is similar to something else)

词根记忆：ana(并列)+log--类似--类似物

例:analog recording模拟录音

派生词:analogous(a．类似的)

3.analogy n.类推：类比(comparison based on resemblance)

词根记忆：ana(并列)+log(说话)+y--放在--起说--类比

例:The teacher made an analogy between the lens of a camera and the lens of an eye.

同根词：prologue(n.序言)；epilogue(n.后记)

4.analytic(al) a.分析（法）的（of or relating to analysis or analytics）

例:analytical writing分析性写作

5.anatomical a.解剖学的 ( of or relating to anatomy )

词根记忆：来自anatomy(n.解剖学 )

例:New genetic evidence-together with recent studies of elephants skeletons,tusks,and other anatomical features-provide compelling support for classifying-Africas forest elephants.

6.anatomy n.解剖(dissection)；解剖学(scientific study of the structure of animal bodies)

词根记忆：ana(向上)+tomy(切，割)--解剖

例:The anatomy of pterosaurs’(翼龙)wings suggests that they did not evolve into the class of birds.

派生词:anatomic(a.解剖学的)：anatomist(n.解剖学家，剖析者)

7.ancestor n.祖先(forefather)

词根记忆：an(在前面)+cest(行走)+or--在前面走的人--祖先

例:Mr.Macdonald's ancestors came from Scotland.

同根词：ancestral(a.原始的：祖传的)

8.ancestry n.祖先(ancestors)；世系，血统(line of descent, lineage)

例:It excluded American-born citizens of Japanese ancestry from landownership.//shared ancestry and culture共有的血统和文化

9.anecdotal a.轶事的(of short, interesting stories about a real person or event)

词根记忆：来自anecdote(n.轶事)

注意：antidote(n.解毒药)

例:There is no written or anecdotal record that Leonardo da Vinci ever painted over major areas of his Mona Lisa.

10.anemia n.贫血(ischemia)；贫血症(a condition in which the blood is deficient in red blood cells, in hemoglobin, or in total volume)

词根记忆：an（无）+(a)em(血)+ia --没血--贫血

例:People who inherit the sickle cell anemia gene from only one parent seem to be resistant to malaria.

同根词：anemic(a.患贫血症的，贫血的)