A/G血浆中清蛋与球蛋白之比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 struggle against nature与自然界的斗争a young probationer nurse年轻的见习护士a rose between two thorns夹坐在两个男人之间的女人A Study of Fuzzy Auditing模糊审计研究a laser navigation device激光导航装置a farm worker/labourer农场工人a relative by marriage.由于婚姻关系而结成的亲戚。a moan escaped the man.那人不禁呻吟了一声。A member of this group.约克茨人这个民族的成员a catastrophic illness.一场灾难性的疾病

1. The umbrella is a poor shelter from heavy rain.
   雨伞不太遮挡得住大雨。