anuan.下极
anart.(用在元音音素前)一
an odor of antiquity古色古香
an authentic antique一件真正的古董
an ultimate truth.根本的事实
an engaging smile.迷人的微笑
an inactive oil well闲置的油井
an insect society.一个昆虫群落
an elevated railroad高架铁路
An archery target.箭靶
anemogenous scrofula风疬
angiotensinogen gene血管紧张素原基因