a

其他意思

1. art. [計] 累加器, 加法器, 地址, 振幅, 模擬, 區域, 面積, 彙編, 元件, 非同步

2. n.

   A is the first letter of the English alphabet.

3. A or a is used as an abbreviation for words beginning with a, such as `acceleration', `ampere', or `answer'.

4. det.

   You use a or an when you are referring to someone or something for the first time or when people may not know which particular person or thing you are talking about.

   • A waiter entered with a tray bearing a glass and a bottle of whiskey