The motor carbon brush of radar antenna has been worn seriously due to long time service. It can not touch really.

雷达天线电机炭刷由于长时间使用磨损严重，接触不良。

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Their health are very important. How ever, some factor such as material defects, metal corrosion, long time service and complex force status etc, can impact the heath status.

但是，材料缺陷、气候环境对金属元件的腐蚀、长期服役及复杂的受力情况等因素都会对锚固螺杆的健康状况产生很大的负面影响。

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The stakeholder can recognize the time required for a service to make a service available to the organization and the time to download the document as long as the service isn't interrupted.

涉众能够确定使某个服务对组织可用所需要的时间，以及在服务不中断的时候下载文档的时间。

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But Voice of America Persian Service has been there for a long time.

VOA: standard.2009.07.02

For a long time your service has demanded a particular kind of sacrifice.

WHITEHOUSE: President Obama Signs Repeal of Don��t Ask, Don��t Tell

All you have to do is look at the coverage of Benghazi where you have four dead Americans, including the personal representative of the president of the United States, the US Ambassador, two former Navy Seals, and a long time foreign service officer.

CENTERFORSECURITYPOLICY: Monica Crowley, Mightier Pen 2012

Similarly, eFax stopped promoting their free fax service a long time ago.

FORBES: Why Freemium Isn't Free