When someone at a restaurant pays for his or her own order and then covers the cost of the next car too.

在餐厅吃饭的人为自己买单后，还为下一辆车买单。

Wind is in the lead here too, costing just $45 per megawatt-hour, with natural gas coming in at $87, coal $102, and nuclear $172.

风能在这方面也处于领先地位， 每兆瓦时的成本仅为 45 美元，天然气为 87 美元， 煤炭为 102 美元，核能为 172 美元。