section a-a a-a  剖面

mounted disc harrow  悬挂圆盘耙

ammonium nitrate fertilizers type A A  型硝酸铵化肥

BOTULINUM TOXIN TYPE A A  型肉毒毒素

A-A-A conjugation structure  A-A-A型共轭结构

S-A(A-A) missile  地空导弹

A.A.A.  美国汽车协会

ⅣA heavy element  ⅣA族重元素

a heavy date  重要的约会

a heavy purse  富裕

a Heavy Rain Process  暴雨过程

A heavy rainfall process  暴雨天气过程

A light purse makes a heavy heart  没钱心事重

A-heavy oil  A重油

Chronic and heavy type hepatitis  慢性重型肝炎

combined-type heavy-duty railway freight car  组合式铁路长大货车

dido type heavy water research reactor  迪多型重水研究用反应堆

everyone had a heavy heart  人人都心情沉重

garbage extruding pile impacted and rammed by a heavy hammer  重锤冲孔夯扩垃圾挤密桩