bet n. 赌，打赌 v．赌，赌钱
例句：I bet it will rain tomorrow.
我相信明天一定会下雨。

gamble n. 冒险 v. 赌博，投机，孤注一掷
例句：Andrew gambled all his winnings on the last race.
安德鲁把赢得的钱全都压在最后一场赛马上了。

bid vt. 出价，投标，祝愿，命令，吩咐 n. 出价，投标 v. 支付
例句：Several firms have bid for the contract to build the new shopping mall.
有几家公司投标，争取建造新购物中心的合同。

bud n. 芽，蓓蕾 vi. 发芽，萌芽
例句：Bud after bud burst forth, while those already opened expanded to full maturity.
一个个花苞都开放了，那些已经开放的呢，都开放得很饱满。

bug n. 臭虫，窃听器 v. 装置窃听器，打扰
例句：The police tested the room for bugs.
訾察检查房间里是否放有窃听器。