buffet：自助餐。
At lunchtime, there's a choice
between the buffet or the set
menu.
午餐可以吃自助餐，也可以選套餐。
We had a buffet supper last
evening.
昨天晚上，我們吃了一次自助晚餐。
Are you having a sit-down meal or a buffet at the party?
你想在party中擺桌宴還是搞自助餐？
sit-down meal：吃宴席飯。
Breakfast will be a cold buffet, not a sit-down meal.
早餐是涼的自助餐，不是坐著吃宴席的那種。