A H Paart.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 bottle-opener开瓶器a bottle of booze一瓶酒aortic adventitia主动脉外膜a lugubrious look阴郁的面容a common approach一个共同策略a variety of toys各种玩具a narrow corridor狭窄的走廊a mezzanine floor夹楼层a chromosome dyad二分染色体a factory hand.工厂工人

1. There is a vein of melancholy in his character.
   他的性格中有少许忧郁的气质。
2. A little danger adds zest to sport.
   少许危险对游戏可以助兴。
3. He had a streak of stubbornness.
   他有一点倔强。
4. They charge a small registration fee.
   他们收一点注册费。