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.
建立了一类柔性基础、刚性设备的复杂系统主动隔振模型，考虑了设备、隔振器、作动器和柔性基础的耦合作用。
An active isolation model is established for the flexible base and rigid equipment systems, taking account of the coupling of equipment, isolators and the foundation.
桉树类树种的蒸腾速率较高，但能生存的主要机理是根系分布深，主动供水能力强，补充了地上部分的水分消耗；
The survival mechanism of Eucalyptus with high transpiration rate in dry hot valley is for their deep root system that can actively supply water to the leaves.
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