1·Far be it from me to interfere in your affairs but I would like to give you just one piece of advice.
我绝不想干涉你的事，我只不过想给你一个忠告。
—— 《牛津词典》
2·She brings me only one piece.
她只给我端来一片。
3·I would like to eat one piece.
我想吃一块。
4·Let's see it all in one piece.
让我们将所有看成一个整体。
5·There's one piece missing.
有一件不见了。
6·Can we buy only one piece?
请问我们可以只购买一件吗？
7·Can I only buy one piece?
我可以只买一件吗？
8·You can carry one piece.
你可以带一件。
9·There was only one piece of cake, but we cut it in two.
只有一块蛋糕， 但我们把它切成两半儿。
—— 《新英汉大辞典》
10·The false bride said to the prince, "Dear husband, pray do me one piece of kindness."
假新娘对王子说：“亲爱的丈夫，请帮我做一件善事吧。”