可操作性定义的英文：
operational definition

operational是什么意思：
adj. 操作的；运作的

The operator O is the null operator.
算符O是零算符。

They are computer operators.
他们是计算机操作员。

monitor operator
之声监听员

It is a major operation. It is a very messy operation.
这是大手术，难度很大。

Has operator received pump instruction and operations manual?
操作者是否收到泵说明书和操作手册?

definition是什么意思：
n. 定义，释义；清晰（度），明确

This definition is circular.
这个定义是循环论证的。

The article lacks definition or definite content.
缺乏确定性或者明确的内容。

As officials of the town, this was definitely their business.
他们既然是这个城镇的官员，这当然是他们的职责所在。

By definition, this way of life is parasitic.
从其含义来说，这是种寄生虫的生活方式。

Save the collection definition
保存收集定义