【问】 请说明improve in与improve on的区别。

【答】 improve in是在“在……方面有改进或提高”：

1. He’ s improving in health. (LDCE)

他的健康状况有好转。

2. Most of their products have considerably improved in quality.

他们的大部分产品在质量上有重大改善。

improve on则是指“对……改善”、“超过”：

1. They improved on his method.

他们对他的方法进行了改良。

2. Tom has never improved on his first book，which had a wild success.

汤姆自处女作获得极大成功以后从未有新的突破。