1.(using numbered tickets)抽彩给奖法
2.(in which players choose numbers)乐透型彩票
the national lottery国家博彩
3.to be a lottery
(be a matter of luck)是碰运气的事；是命中注定的事
The stock market is a lottery.股市买卖全看运气。
Marriage is a lottery.婚姻全靠缘分。
Finding a parking space can be a bit of a lottery.找停车位有时要靠点运气。