钢构件变形容许值的英文：
allowable value of deformation of steel member

allowable是什么意思：
adj. 允许的，正当的，可承认的

This agenda does not allow compromise.
这一议程容不得商量。

Allow me to introduce myself.
允许我把我自己向你介绍。

The ship was dry and no liquor was allowed.
船上是禁酒的，不准卖含酒精的饮料。

deformation是什么意思：
n. 变形

Any deformity repel her.
任何缺陷都使她厌恶。

To shape badly; deform.
损毁…的形状；使成畸形

The invariant space has to be as well a deformation of a classical space, a deformation that makes it noncommutative.
这些不变的空间同样也是经典空间的变形，它们通过这种变形成为非对易空间。