具体数的英文：
n. occurrence number

The occurrence of such things is by no means fortuitous.
出现这种问题绝不是偶然的。

The occurrence of such things is by no means fortuitous
出现这种问题绝不是偶然的。

In data base terminology, a single instance, for example, a set occurrence, a record occurrence.
在数据库术语中，一个单一实例，例如，一组具体值，一个记录的具体值。

We regret the occurrence of things that are bad.
我们对坏事的出现感到遗憾。

History is dotted with rum and inexplicable occurrences.
历史中不时穿插着一些离奇而难以说明的事件。

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。