Project manager responsibility system and project cost keeping system are two effective measures to improve the level of management and efficiency of construction enterprises.

工程项目施工管理推行项目经理责任制和项目成本核算制是提高施工企业管理水平和效益的有效措施。

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Develop a record keeping system that you can use to document the review of customer orders and contracts.

制定档案记录制度，用来对客户定单和合同进行建档。

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A time keeping system consists of atomic clock assembly, measuring and comparing system and computation of atomic time scale, etc.

守时系统是一种需要连续、可靠运转的复杂系统，包括守时钟组、比对测量系统、原子时归算等多个环节。

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The Environmental Protection Agency, is keeping a close watch on threats to the delicate eco-system along the coastline.

VOA: standard.2010.05.18

So, and of course, you know, keeping entropy as a fixed variable for a system like that is extremely cumbersome.

所以，对这样的系统要求它们的熵保持恒定,和一个非常笨拙做法。

麻省理工公开课 - 热力学与动力学课程节选

So, we have a problem here if we're thinking about keeping things at the lowest energy, so there's a lot of ring strain in the system.

现在有个问题,我们考虑要把能量降到最低，所以环上有许多应力。

麻省理工公开课 - 化学原理课程节选

There were calls to improve the record keeping system, and to make it more farmer friendly.

BBC: Environment and Sustainability Committee

Malcolm Bendle, the Longtown company secretary, maintains that the market's book-keeping system is so meticulous that private trading is impossible.

ECONOMIST: Farmers

Indeed, the prototype has a distance-keeping system that will brake to a standstill, and move off again when the car in front moves.

ECONOMIST: Motoring