n.改良;改进
动词improve的现在分词形式.
We thank you for your support at improving the protection. 我们衷心的感谢您对我们产品的改良的支持。
He is certainly improving in his spelling. 他的拼写大有改进。
We should work on improving our tourism industry. 我们应该努力改进我们的旅游业。