assurance/assure
assurance/əˈʃuərəns/n.1.[c]&[u]保证,表示保证(或鼓励、安慰)的话: In spite of all his assurances, he did not come.尽管他一再保证,结果还是没来。[考句]The director gav···
asthma
asthma/ˈæsmə/n.[u]哮喘病:acute (chronic) asthma急性(慢性)哮喘I think he's having an asthma attack.我想他现在是哮喘病发作了。
astonish/astonishing
astonish/əsˈtɔniʃ/vt.使大为惊异,使惊骇(愕):The news astonished everybody.这消息使人人感到惊愕。be astonished感到惊异(后跟不定式、分句或at短语):I was astonished to see him he···
astronaut
astronaut/ˈæstrənɔ:t/n.[c]宇航员:The astronauts are trained in the lab.宇航员在实验室里受训。There're three astronauts in the spacecraft.在这艘宇宙飞船里有三名宇航员。
astronomer/astronomy
astronomer /əˈstrɔnəmə/n. [c]天文学者;天文学家:A new star attracted the notice of the astronomer.新发现的一颗星引起了那位天文学家的注意。Astronomers can calculate when there···
asylum
asylum/əˈsailəm/n.1.[c]收容所,救济院;精神病院:an orphan asylum孤儿院2.[c]避难所,庇护所;避难;[u]政治避难权,庇护权:political asylum政治避难;ask for asylum in Cana···
asymmetrical
asymmetrical/əsiˈmetrikəl/adj.不均匀的,不对称的([反]symmetrical):asymmetrical shapes不对称的形状the asymmetrical relationship between a landlord and a tenant房东与房客之间的···
at
at/æt,ət/prep.①地点名词前(说话人将该处看作一个点时):at his office在他办公室里;at my uncle’s在我叔父家里;at the station在车站②表示进攻目标的名词前(常跟一些动词搭配):shoot (···
athlete/athletic
athlete/ˈæθli:t/n.[c]运动员:athletes and coaches运动员和教练员Athletes from different countries competed at the Olympic Games.奥运会上各国运动员进行了比赛。athletic/ˌæθˈl···











