Trees are natural air conditioners. They take harmful gas from the air, and release oxygen into the air.
树木是天然的空气净化器，他们可以吸收空气中有害的气体并向空气中释放氧气。
Well, trees are natural air conditioners. They cool the air and clean it. Three trees can do the job of 15 air conditioners.
嗯，树木是天然的空气净化器。他们空气的温度下降，把它打扫干净。三棵树就能做这项工作15空调。
Thanks to the natural light and ventilation, lamps and air-conditioners are not needed, which saves a lot of energy.
由于自然光和自然通风，空调和人工照明不再是必须的，节省了大量的能源。
The thesis studied the situation of performance matching for natural refrigerant propane (R290) instead of R22 in minitype room air conditioners.
本文研究了自然工质丙烷(R290)替代r 22在小型家用空调的性能匹配情况。
The thesis studied the situation of performance matching for natural refrigerant propane (R290) instead of R22 in minitype room air conditioners.
本文研究了自然工质丙烷(R290)替代r 22在小型家用空调的性能匹配情况。
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