Henry says a nuclear-free world also means that countries need to work together and create an environment that will help prevent international conflicts.

VOA: standard.2010.08.06

They're stuck to a surface that's provided by the environment that's around them, they're not swimming free in solution.

他们黏联在,周围环境的表面上,而不会在溶液中自由运动

耶鲁公开课 - 生物医学工程探索课程节选

They need time out to free from their working environment so that they can take time to learn.

他们需要时间,摆脱工作环境,以便于有时间学习。

麻省理工公开课 - 媒体、教育、市场课程节选