improve in和improve on 什么意思?
问题描述：
improve in和improve on 什么意思?
能不能帮忙找几句例句来解释一下.
答
improve in 在…方面有所提高
He has much improved in health.他的健康状况大有改善.
improve on 在…加以提高
He's never improved on his first book.他从未写出比他第一部著作更好的书.