The principal countermeasures are the following: to deepen and broaden tourist publicity, to keep constant renewal of tourist products, and to improve tourist industry management.

其基本措施有：强化旅游宣传的深度和广度；更新旅游产品；提高旅游业经营管理水平。

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How to keep constant temperature in production floor during winter time?

在冬季，车间里是如何做到温度的恒温的？

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The cancellous bone porosity basically keep constant along the transversal direction.

松质骨孔隙率在垂直于轴向的方向基本不变。

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On the other hand, temperature, volume and pressure are variables that are much easier in the lab to keep constant.

另一方面，温度，体积和压强,在实验室中比较容易保持恒定。

麻省理工公开课 - 热力学与动力学课程节选

STUDENT: PROFESSOR: Yes, thank you. All right, it is constant. You keep sitting back there where I can't get to you. Thank you very much.

学生：【不解中】,教授：是的，是常数，如果，就是常数,你坐在那儿一动不动我没法找到你。

麻省理工公开课 - 计算机科学及编程导论课程节选

How do I keep p1 constant while I'm lowering the volume?

怎么保持压强不变,而减小体积？

麻省理工公开课 - 热力学与动力学课程节选

At the company's operations center, employees keep constant tabs on coordinating operations across the globe, including everything from world events to weather.

ENGADGET: Inside UPS' Worldport: How a shipping titan moves 2,000 packages every 17 seconds

Or the way our cell phones keep constant tabs on our locations, what texts we send and what phone calls we make and receive.

FORBES: My Software Isn't Creepy

"To help support the economic recovery in a context of price stability, the Committee will keep constant the Federal Reserve's holdings of securities at their current level by reinvesting principal payments from agency debt and agency mortgage-backed securities in longer-term Treasury securities, " the FOMC says, adding it will continue to roll over the Federal Reserve's holdings of Treasury securities as they mature.

FORBES: U.S. Economy