改善的英文：
make better
improve

参考例句：

Housing improvement was the speaker's text.
改善住房是那位演讲人的题目。

The improvement in sewerage and drainage systems,
排水设备和排水系统的改善…

Deepen reform and strengthen and improve macro-control
深化改革，加强和改善宏观调控

self-improvement in behavior or morals by abandoning some vice.
在行为或道德上的放纵而进行自我改善。

Promote stomach to wriggle, improve constipation condition efficiently.
促进肠胃蠕动，有效改善便秘情况。

The humanitarian scientist called on the improvement of the poor's living condition.
这位人道主义科学家呼吁改善穷人的生活条件。

Protecting natural forest resources, carrying out afforestation and improving the ecological environment
保护天然林资源，开展植树造林，改善生态环境。

Industrialisation in tunnel construction, tunnel upgrading and widening
隧道建设工业化，隧道的改善和加宽.

The original purpose of mercerization was to improve the luster of cotton fibers
丝光的本来目的是改善棉丝维的光泽。

Improved the implementation of parent::method_name() for classes which use runtime inheritance.
改善了用户运行期间继承的类的parent::method_name()

make是什么意思：
v. 做；制造；生产；使得；获得；准备；引起；开始；使成为，产生；构成
n. 形状；样式；制造；构造；品牌

a man of this make
这种性格的人

make an example of
1.惩罚...以儆戒他人

make a dive for
向￥冲去

better是什么意思：
adj. 较好的
adv. 更好的；更多的；较大程度地
v. 改善；胜过；变得较好
n. 前辈；长辈

the better of the two
两者中的更好者

The more, the better.
越多越好。

The shorter the better.
越短越好。

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。