Part of it is that they provide necessary services.

部分是因为它们提供了必须的服务。

youdao

Make sure all the necessary services on the server are running.

确保服务器上所有必需的服务在运行。

youdao

Within the init method of the portlet, retrieve the set of necessary services.

在 Portlet 的 init 方法中，检索所需服务的集合。

youdao

"The lack of access is also affecting the ability of the Afghan population to obtain the necessary medical assistance and basic services, which they need,and which they are increasingly not getting,"

VOA: standard.2009.08.07

condemned acts of intimidation against the Brazilian Embassy and called upon the de facto government of Honduras to cease harassing the Brazilian embassy, and to provide all necessary utilities and services, including water,electricity,food, and continuity of communications,".

VOA: standard.2009.09.25

These extra but often necessary services will be an additional cost in the retirement budget.

FORBES: Will You Have Enough to Retire?

Their function is to deal with individuals, businesses, nonprofits, universities, whatever provides certain necessary services.

FORBES: Intelligent Investing Panel

Microsoft says it polled 50, 000 people about the phone features that mattered most to them and baked all the necessary services into KIN.

FORBES: Five Key Questions (And Answers) About Microsoft's New KIN Phones