取的更好的成绩用英文怎么说

"Getting better grades" 可以用英语表达为 "improve one's academic performance"。

"Improve" 是一个动词，意思是提高，增强。"Academic performance" 是名词短语，意思是学业表现。

下面是一些例句：

"I need to improve my academic performance if I want to get into a good college."
"She has been working hard to improve her grades."
"He has been struggpng with his academic performance, but he is determined to improve it."

翻译：

"如果我想进入好大学，我需要提高我的学业表现"
"她一直在努力工作，提高她的成绩"
"他一直在与他的学业表现挣扎，但他决心提高它"