1. Speaking of tips, you should never offer the bar staff a cash gratuity. 说到“小费”，妳可千万别给酒保现金以表示谢意。
2. In general, the more Westernized the place is, the more likely you will be expected to leave a gratuity. 总的说来，一个地方西化的程度越高，希望就越有可能需要给小费。
3. Sometimes large parties are unaware that a gratuity has been added to the bill, so they tip on top of it. 有时，大型聚餐人们没有察觉到小费已被打入帐单，因此他们又另外付了小费。
英英解释
n.
1. a relatively small amount of money given for services rendered (as by a waiter)
2. an award (as for meritorious service) given without claim or obligation
