1、二，two美 /tuː/英 /tuː/。

2、词典释义：two，n. 两个；adj. 两个的；num. 二。

3、例句：做此决定理由有二：第一…There are two reasons for this decision: firstly...有三分之二的人认为总统应当辞职。Two out of three people think the President should resign.