无穷小量的英文：
dimensionless

参考例句：
  • Newton says he has abandoned the infinitesimal or infinitely small quantity.
    牛顿说他已放弃了微元或无穷小量。
  • The infinitely small "dx" and "dy" were sometimes described as vanishing or incipient quantities
    有时候把无穷小量dx和dy描述成正在消失的或者刚出现的量。
dimensionless是什么意思：
n. 无量纲的，无因次的
  • dimensionless quantity
    无因次值|无量纲的量
  • A dimensionless geometric object having no properties except location.
    点除了位置没有其它特点的无维几何体
  • A dimensionless physics is not so profound as it may sound, nor would it necessarily be a terminus of man's downward probing.
    无量纲物理学不像听起来那么深奥，也未必是人们向深处探索的终点。
  • A very useful tool for scale-up is the dimensionless group. This is the grouping of system variables so as to cancel out their dimensions.
    在放大中使用的一个很有用的工具是无量纲数群。这是系统变量无因次化的一种组合。

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