A-CSn.校准计时装置aart.一(个)；每一(个)；任一(个)n.英语字母表的第一个字母；学业成绩得优者；表示“最好”的符号A young girl was dittybopping.一个小姑娘正随着音乐节拍摇摆。a gentle slope/curve/angle平缓的斜坡/弯道/角度A low/high level of radiation低[高]强度辐射A wall between presenves love.君子之交淡如水。A New Pumpkin Cultivar 'Hongyun'A Companion to French Literature《法国文学指南》A little insurance never hurt.有点保障，不会有坏处。A feeble or ridiculous imitation拙劣或滑稽的模仿A woman skilled in equitation.女骑士善于骑马的女骑手a well-known wit and raconteur一个有名的妙语如珠会讲故事的人.