You can study hard and improve it.
你可以努力学习,提高你的汉语.
Your work will get by, but try to improve it.
你的工作还过得去,不过还得努力改进一下.
So they taught you how to improve yourself as an actor?
于是他们教你作为演员如何进一步改进自己?
The new report says those who received medicine did improve.
新的报告声称接受药物治疗的人在增加.