两:1.Used before a classfier or 半,千,万,亿,etc. eg,两公里(two kilometres);两岁的女孩(two-year-old girl);每隔两天(every two days);两个半小时(two and a half hours);两万元(twenty thousand yuan);2.both(sides);either(side) eg,两侧(both sides;either flank)小路两旁(either side of the walk);敌对的两军(contending armies);3.a couple;a few;some:再等两天(wait for a few (or a couple)more days);你再拿两个走吧(Take some more with you)
2: 2楼(second floor);这事我略知一二(I know a little about it);二者必居其一;其它的道路是没有的(Either one or the other,there is no other choice);二者不可兼得(You can't eat your cake and have it too);不二价(fixed price;no bargaining);三心二意(of two minds;shilly-shally)
