我们确实也有更复杂的系统用于空间供暖，它们分为两类，被动供暖系统和主动供暖系统。

We do also have more complex systems that are used for space heating and they fall into two categories, passive and active heating systems.

youdao

我们确实也有更复杂的系统用于空间供暖，它们分为两类，被动供暖系统和主动供暖系统。

We do also have more complex systems that are used for space heating and they fall into two categories, passive and active heating systems.

youdao