重點講解：
the least
（應該做的）最少量，最低程度；
eg. Well, the least you can do, if you won't help me yourself, is to tell me where to go instead.
你自己要是不幫我，好歹也告訴我該上哪兒去呀。
eg. The least they could have given me was half a day to rest.
他們本應該起碼給我半天時間休息。
eg. The least his hotel could do is provide a little privacy.
他的酒店至少應該提供一點隱私保護。
注：that's the least that I can do，表示，“這是我最起碼能做的；我樂意效勞”；
eg. Why not relax and let me teach you how to windsurf? It's the least I can do.
干嗎不輕松一下，讓我來教你玩帆板？我樂意為你效勞。
eg. I want to help — it's the least I can do for the girl who saved my brother.
我想要幫忙——這姑娘救了我弟弟一命，這是我最起碼能做的。