He did a lot to improve conditions for factory workers.
他为改善工厂工人的工作条件做了许多工作。
I thought the best way to improve my French was to live in France.
我认为提高我的法语的最好办法是在法国生活。
Her health has improved dramatically since she started on this new diet.
自从开始这种新的饮食，她的健康状况大为改善。
