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1·The cheapest solar power now costs $120-140 per megawatt hour.

目前最便宜的太阳能每兆瓦时需要120-140美元。

2·For example, it recently won an order to provide a 2.2 megawatt-hour battery, the size of a shipping container, for use in tests to back up a Chinese coal-fired power station.

例如，它最近获得了一个订单，为中国的一个火力发电厂提供一个2.2兆瓦时，集装箱大小的电池，进行备份测试。

3·Prices have fallen from around $60 per megawatt-hour last summer to $20-30 this summer. They are strongly tied to the prices of natural gas and coal, which have both fallen too.

电价从去年夏季每兆瓦约60美元下跌至今夏的20—30美元，紧随天然气和煤的跌价而下跌。