limit
单词辨析：
指在时间、数量、水平等方面加以限制，侧重事物的限度。
We must limit our spending.
我们必须限制开支。
His talk is limited to 30 minutes.
他的谈话限定在30分钟。
指将某人或某事物限制在某活动、主题、地区等范围之内，通常用被动语态。
They confined their study to 12 cases.
他们把研究限定在12个案例以内。
The work will not be confined to this area.
此项工作不会局限于这一地区。
指控制某事物的大小、数量或范围，侧重限制行为。
You can restrict access to certain files.
你可以限制某些文档的传阅人数。
The deal will restrict competition.
这个协议将限制竞争。
相关例句：
In order to reach this limit a number of technical problems will have to be solved.
要达到这个限度，还有很多技术问题必须解决。
Entry to this prize draw is limited to UK residents.
这次抽奖只限英国公民参加。
In the circumstances we'll tell you what we can, within limits, of course, and in confidence.
在这种情况下，我们会把能告诉你的都告诉你，当然这是有限度的，而且需要保密。
These establishments are off limits to ordinary citizens.
这些建筑禁止普通公民入内。
He accepts he was exceeding the speed limit
他承认自己超速了。
She has to work within the limits of a fairly tight budget
她不得不在相当紧张的预算范围内精打细算。