Third, primary groups are fundamental because they serve as powerful instruments for social control.

第三，初级群体是基础，因为他们是社会控制的有力工具。

youdao

Creative ideas not only produce their own instruments of survival as time and circumstances demand, but permit the substitution of new forms for old under the pressure of changed circumstances.

创造性的思想不仅随着时间和环境的需要产生自己的生存工具，而且允许在已变化环境的压力下用新的形式代替旧的形式。

youdao

youdao

Doctors pushed their instruments into the wound as they continued to look for the bullet.

VOA: special.2010.04.22

And you went ahead and worked with the Listening Exercises nine through eleven to engage the musical instruments a bit in those particular exercises, and we have performers here today that are going to, as you can see, demonstrate some of these instruments for us.

你们先前做过,听力练习九至十一题,在这些练习中,你们增长了对乐器的一些认识,今天我们请来了表演者,你们将看到,他们稍候,将为我们在这里演示一些乐器

耶鲁公开课 - 聆听音乐课程节选

Dialogue and negotiations are preferred as instruments for resolving even the most difficult international conflicts,".

VOA: standard.2009.10.09

Claiming that "dialogue and negotiations" are now "preferred as instruments for resolving even the most difficult international conflicts" is not the same thing as saying that these instruments have actually resolved any international conflicts, let alone the most difficult ones.

CENTERFORSECURITYPOLICY: Peace in our time

Dialogue and negotiations are preferred as instruments for resolving even the most difficult international conflicts.

CNN: Obama: Nobel Peace Prize is 'call to action'

It also taught the participants how to use information and communication technologies (ICT) as instruments for searching and producing new content that would transmit messages on preventing violence in their communities.

UNESCO: MEDIA SERVICES