基本概率的英文：
elementary probability

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

probability是什么意思：
n. 可能性，或然率；几率

thing that is(most)probable;probable event or result
（很）可能有的事物; 可能发生的事;可能出现的结果

They'll probably have a few in by this time.
到这个时候他们多半会喝上几杯。

the probability of a specified outcome.
有产生特定结果的可能。

ten to one ;very probably
十之八九;非常可能地

He is probably malnourished.
很可能他也会营养不足。