一定数量

cetane number───十六烷值增进剂

cetane numbers───十六烷值增进剂

contact number───联系电话

lepton number───[高能]轻子数

neutron number───n.核内中子数

serial number───序号，编号

cardinal number───基数

contact numbers───联系电话

counting number───自然数；计数（counting是count的现在分词）

Each marshmallow cloud can hold a certain number of people.───每个棉花糖云都能承载一定数量的人。

of letters had been considered as unpublishable.───信件被认为是不能出版的。

A certain number of years ago, this place was still a little fishing village.───年前，这里还是一个小渔村。

To get into the habit, set an alarm or make it a goal to do reality checks a certain number of times per day.───养成一个习惯，订一个闹钟，或者制定一个计划，即每天作多少次现实检查。

At this stage we shall still have to repulse a certain number of offensive campaigns the enemy may launch at the front.───在这个时期内，还要打退正面敌人一些可能的战役进攻。

In terms of this school of thought, all objects in the physical universe are reducible to a certain number of atoms.───在这个学派的术语里面，物质宇宙的所有物体都可以还原成许多数目的原子。

I have given you then today the outline of the apparatus around which we are going to be able to pose again a certain number of questions.───今天，我给你们描绘出，人作为这个器官的轮廓，环绕着它，我们将要再提出某些的问题。

They had all been invited, and each person who was invited had to bring with him a certain number of silver and gold coins.───他们都曾经收到过这样的邀请，并且每个受邀的人必须要带一点疏漏的银币或金币。

The advantage of this conception is to make appear, to give the reason, why anxiety appears in a certain number of ways of obtaining orgasm.───这个观念的优点，就是要让这个理由出现，要提出这个理由，为什麽焦虑会以某些获得性高潮的的方式出现。

A certain number of members must be present before a meeting is said to be quorate and can proceed.

A certain number of days are set aside throughout the session for non-governmental business.

Each has been allocated a certain number of streets, but like everything else it takes time.

Only a certain number of people are allowed in the building at any one time.

Both orders allow a certain number of new conditions to be imposed, again with reduced compensation being payable.

Let's say you want to invoke a certain number of one-way services that each invoke a one-way operation as call-back.

Once a certain number of users have solved the suspicious word with the same result, it becomes a control word itself and the OCR software can learn this word.

We will not specify that a certain number or percentage of candidates are to be awarded merit.

And, of course, there are only a certain number of people you can approach with that request.