辛烷值的英文：
octane number

Of or relating to highly volatile high - octane gasoline.
高挥发性的，高挥发性汽油的

Adamantane and bicyclo (222) octane are predominantly Chlorinated at the bridgeheads by this procedure
金刚烷和二环〔222〕辛烷主要是按照这个程序在桥头氯化。

A process in which naphthas are converted to high - octane aromatics in the presence of hydrogen and a catalyst under pressure and heat.
临氢重整在高温高压下，在氢和催化剂的作用下石油精转化为高辛烷值的芳烃的过程

The number was fifty.
该数字为五十。

There is safety in numbers
人多势众

It was an irrational number.
这是一个无理数。

Which number on the card is a prime number?
在卡片上哪一个数字是最初的数字？

The number raised to the logarithm of a designated number in order to produce that designated number.
被升到指定数字的对数上的数量,是为了得到那被指定的数目。