gratuity tip
小费小费
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Sometimes large parties are unaware that a gratuity has been added to the bill, so they tip on top of it.
很多人有时会遗忘账单上已附上小费的费用，于是会爆发重复付小费的景况。
youdao
Money given as a gratuity, a tip.
赏钱，小费出于感激而给的钱，小费。
Though, that doesn't mean you're not free to tip some cash on top of the default gratuity.
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