因此闭系可以是，比如说，一杯放了，一个冰块的冰水，顶上加了盖子。

So a closed system would be, for instance, a glass of ice water with an ice cube in it, with the lid on top.

youdao

因此闭系可以是，比如说，一杯放了，一个冰块的冰水，顶上加了盖子。

So a closed system would be, for instance, a glass of ice water with an ice cube in it, with the lid on top.

youdao