初等的英文：
elementary (i.e., easy)

参考例句：

Primary algorithm
基本算法,初等算法

elementary ordinary differential equation
初等常微分方程

"elementary, secondary and higher education"
初等、中等和高等教育

elementary geometric transformation
初等几何变换

At school we should train young children to be good citizens.
我们在初等学校应当训练青少年如何当好优秀公民。

Elementary and secondary education , which forms public education, is free and compulsory.
初等和中等教育属公立教育，是免费和义务的。

Using Greek sources, he compiled in Latin selections from elementary treatises on arithmetic, geometry, and astronomy
他根据希腊材料用拉丁文选编算术、几何与天文的初等读物。

elementary是什么意思：
adj. 初级的；基本的；简单的

elementary subdivision
初等重分

The cyclotron frequency can also be derived by an elementary argument
回转频率也可以通过浅显的论证导出来。

Will it is better to send them to a private elementary school?
是不是送他们到私立小学比较好?

A metering tank is an elementary method of measuring volume flow.
量筒是测定容积流量的基本方法之一。

"elementary, secondary and higher education"
初等、中等和高等教育

easy是什么意思：
adj. 容易的，不费力的；安逸的；宽裕的；舒适的；宽容的；从容的
adv. 不费力地；从容地

Easy come; easy go
来得容易去得也快

Is the problem that easy?
问题有那么简单吗?

The setup will not be easy.
调整不会轻松实现。

"Easy come, easy go"
来得容易,去得快

"Easy come, easy go."
来的容易,去的快