The open angle of the flow control valve is adjusted by electric actuator, which can be controlled remotely to meet the requirement of system measure.

流量控制阀由电动执行器调节开度，可实现远距离控制阀门的开度，以满足系统计量的要求。

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The SPRD will automatically open as the air pressure in the duct system increases, in order to prevent the reduction of air flow and excessive noise and velocity through the duct system.

当管道系统空气压力增加时，SPRD会自动开启，以防止管道系统中空气流动的减少和过度噪音和速度。

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Please everyone in publicity with general location, open, with unified user name and password: IFC log in, can be familiar with advertising system operation flow of.

请大家在宣传的同时，打开通用地址后，用统一用户名和密码：IFC 登陆，即可熟悉广告系统的操作流程。

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Together, we have taken steps to stimulate growth, restore the flow of credit,open markets, and dramatically reform our financial regulatory system to prevent such crises from occurring again - steps that will lead to job creation at home,".

VOA: standard.2009.04.11

An open system, as the name describes, allows mass and energy to freely flow through the boundary.

开系，顾名思义，允许质量和能量自由地,流过它的边界。

麻省理工公开课 - 热力学与动力学课程节选

system is the opposite of the open system, no mass and no energy can flow through the boundary.

孤立系与开系正相反，没有质量或能量,能流过它的边界。

麻省理工公开课 - 热力学与动力学课程节选