定义区间的英文：
interval of definition
n. 间隔；间距；幕间休息；区间
fundamental interval
基本差距
It rained at intervals.
雨时下时停。
There was a long interval of silence.
中间有很长时间的沉默。
This combination is named the square of the
人们把这个组合称作“间隔”的平方。
During the interval, wine was served.
幕间休息时有葡萄酒供应。
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