Planar strips,vertical stages,continuous backpedal and strong succession are the characteristics of the glutinite body distribution in a rift extensional basin. 断陷伸展湖盆陡坡带上的砂砾岩体具有"平面分带、垂向分期、持续后退、继承性强"的分布特征。
And both of them had some extensional movement, which is unusual.
另外，两次地震都出现拉张运动的迹象，这一现象很不寻常。
英语百科
Extensional context
（重定向自Extensional）
In philosophy of language, a context in which a sub-sentential expression e appears is called extensional if and only if e can be replaced by an expression with the same extension and necessarily preserve truth-value. The extension of a term is the set of objects that that term denotes.