The system can be an open system, or it can be a closed system, or it can be isolated.

系统可以是开系，可以是闭系，或是孤立系。

youdao

It remains to be seen, however, whether Apple's own closed platform will continue to be successful in the face of open source alternatives.

剩下来我们只能看，苹果公司这个封闭平台拥有者能否面对开源替代方案持续保持成功。

youdao

Sit, breathe, and be still. Eyes can be open or closed.

坐下，呼吸并且保持淡定。眼睛或睁或闭。

youdao

The system can be an open system, or it can be a closed system, or it can be isolated.

系统可以是开系，可以是闭系，或是孤立系。

麻省理工公开课 - 热力学与动力学课程节选

These can be closed beyond the open windows for privacy in summer, and shut in winter for warmth and insulation.

ECONOMIST: Building design

The Big One ride will be closed until the investigation has been completed but the Pleasure Beach will be open as usual on Friday for visitors wanting to see the famous illuminations switched on by boy band Westlife.

BBC: Inquiry into rollercoaster crash

Another designer has ideas to create "smart wings" with materials that change shape or have holes that can be open and closed to create the kind of airflow needed to maintain or reduce air speed.

BBC: The futurist: Will green aeroplanes take off?