促进学生德、智、体、美全面发展的英文：
ensure that students improve in terms of their moral, intellectual and fitness level as well as in their appreciation of aesthetics

ensure是什么意思：
v. 保证，担保；保护，使安全，确保

No system that ensured spiritual progress.
没有确保精神进化的系统。

Ensure the effectiveness and identification of document.
确保文件的有效性,并得到明显的识别。

Please rest assured that repayment is ensured.
请您放心，还款是有保障的。

improve是什么意思：
v. 改进；提高…的价值；利用；提高

There is still room for improvement.
还有改进的余地。

Technical advances improve productivity.
技术进步提高生产力。

Her service has improved.
她的发球有了提高。