This paper brings forward the method of dividing a city into different circle layers, make certain the property of each layer, to make sure the urban population and urbanization level.

但由于城市行政界限的频繁变动和一些城市无限制地扩大市区行政面积 ，使城市人口和城市化水平的统计数字失真。

youdao

They actually make sure that certain streets get ploughed and other streets do not get ploughed when there is a snowstorm.

VOA: special.2011.04.25

There's a certain pragmatic element behind this, basically we want to make sure that every human being has a dignified life.

这后面是有实用的因素，因为我们想确保,每个人都过上有尊严的生活。

普林斯顿公开课 - 人性课程节选

to make sure that you speak with someone who is very knowledgeable about the prices of certain things.

一定要跟某些很了解价格行情的人谈谈。

关于购买艺术品 - SpeakingMax英语口语达人

Marketers are tweaking ads to make sure the "message gets through" and "are trying to make sure they are not offending certain audiences, " says Eileen Campbell, chief executive officer of the research company.

WSJ: Advertisers Practice for Super Bowl

Even if you are careful about your Facebook privacy settings and you make sure only certain colleagues see your posts, Facebook postings are not as effective as in-person meetings about the problem at hand, says Golden.

FORBES: When Is It OK To Diss Your Boss Online?

But I can make sure -- I can do my best to make certain that they get a chance to succeed or fail on their own merits, just like I did.

WHITEHOUSE: President Obama Speaks on Holding Head Start Programs Accountable | The White House