词族 · gradational
派生词
英语词源
- gradational (adj.)
- 1785, from gradation + -al (1).
权威例句
- 1. Abrupt fluid a permeable reservoir; gradational ones indicate a low permeability with a high capillary pressure.
- 突变的流体界面表层储层具有很好的渗透率, 而渐变的流体界面表明储层的渗透率较差,且储层的毛细压力较高.