1·He did it on purpose, knowing it would annoy her.
他明知会激怒她，却故意那么做。
—— 《牛津词典》
2·Mary thought that perhaps the sun held back a few minutes just on purpose.
玛丽想，也许太阳故意推迟了几分钟才下山。
3·To be seen crying sadly, the little boy raised his head and had the tears falling down on purpose.
为了让别人看见他哭得很伤心，小男孩抬起了头故意让眼泪掉下来。
4·I wondered whether she fell asleep on purpose.
我很想知道，她是不是故意睡着的。
5·This is especially true here, and it was on purpose.
这一点在这里尤其准确，并且它是故意的。
1·Accidentally or on purpose, many of them are discharged into streams and lakes.
无意或有意地，它们中的许多被排放到河流和湖泊中。
2·Every bit of content advertises something, whether on purpose or not.
每一丁点的内容都在替什么做宣传，不管是有意还是无意。
3·This is on purpose.
这是有意的。
4·Jeff Nichols, the executive director of the Mark Twain House and Museum in Hartford, Connecticut, said Twain chose his words on purpose, to reflect his times.
康涅狄克州哈特福市马克吐温故居及资料馆主任杰夫·尼科尔斯告诉记者，马克吐温有意选用这些词句，他是为了反映那个时代。
5·He said this on purpose.
他有意这样说的。
1·You are on purpose , aren't you ?
“你是成心的吧”这句话如何翻译？