- why is he late他为什么迟到
- What is this这是什么？
- atomic numbern.原子序数（指元素在周期表中按次序排列的序号）;
- as it is照现状看，看样子;
- as is the case情况也是如此
- as is known to all人所共知；众所周知;
- as is照现在的样子（指不再作修理或改进）;
- as far as something is concerned就某件事而言
- as far as one is concerned就…而言;
- any number ofadj.许多;
- answer up迅速回答; 清晰地讲;直言不讳地回答; 照实回答;
- admission number[医]住院号;
- add up to总计达;<口>等于; 意味着; 总起来说;
- add up加起来; 总计;与应有的数量相符;<口>合乎情理;
- act up（病痛等）复发;炫耀;行动倔强;（机器等）功能失常;
- account number账号;
- a set number of一组数
- a number of许多的;一些;
- a large number of很多;
- a great number of多数的;千;老鼻子;
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