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

詞根記憶：an(不，無)+aero(空氣)+bic--不要空氣的--厭氧的

例:anaerobic metabolism無氧代謝

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

詞根記憶：ana(并列)+log--類似--類似物

例:analog recording模擬錄音

派生詞:analogous(a．類似的)

3.analogy n.類推：類比(comparison based on resemblance)

詞根記憶：ana(并列)+log(說話)+y--放在--起說--類比

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

同根詞：prologue(n.序言)；epilogue(n.后記)

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

例:analytical writing分析性寫作

5.anatomical a.解剖學的 ( of or relating to anatomy )

詞根記憶：來自anatomy(n.解剖學 )

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)；解剖學(scientific study of the structure of animal bodies)

詞根記憶：ana(向上)+tomy(切，割)--解剖

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

派生詞:anatomic(a.解剖學的)：anatomist(n.解剖學家，剖析者)

7.ancestor n.祖先(forefather)

詞根記憶：an(在前面)+cest(行走)+or--在前面走的人--祖先

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

同根詞：ancestral(a.原始的：祖傳的)

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

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

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

詞根記憶：來自anecdote(n.軼事)

注意：antidote(n.解毒藥)

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

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

詞根記憶：an（無）+(a)em(血)+ia --沒血--貧血

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

同根詞：anemic(a.患貧血癥的，貧血的)