张跃征募了自己的工程师，并开始研究如何建造既便宜又环保的建筑来抵御地震。
Zhang drafted his own engineers and started researching how to build cheap, environmentally friendly structures that could also withstand an earthquake.
自行车是一种既便宜又环保的交通工具。
Bicycle is a cheap and environment-friendly means of transport.
默瑟把这叫做“免费制冷”，还说它可用来取代冷藏机组和空调设备，既便宜又环保。
Mercer calls this "free cold" and says it could be used as a cheap and green way to replace refrigeration units and air conditioning.
默瑟把这叫做“免费制冷”，还说它可用来取代冷藏机组和空调设备，既便宜又环保。
Mercer calls this "free cold" and says it could be used as a cheap and green way to replace refrigeration units and air conditioning.
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