钢构件容许长细比的英文：

allowable slenderness ratio 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。

slenderness是什么意思：

n. 纤细

All girls want to be slender.

所有女孩都希望苗条。

The daughter was to have but a slender provision.

女儿只能得到一份菲薄的嫁妆。

It was a long slender stick of vivid yellow.

那是一根鲜黄色的又细又长的粉笔。

ratio是什么意思：

n. 比率；比例

neutralization ratio

中和比率|中和比例

This is the prime ratio of the nascent increments

这是最初增量的最初比。

Asset quality ratios: Ratios that measure the quality of assets of a lending institution.

资产质量比率:衡量贷款机构资产质量的各种比率。