相反，对像特斯拉这样已成功研发出家用充电电池的公司的投资（这一发明可能导致改用太阳能发电的家庭数量急剧增加）看上去更有前景。
By contrast, investing in a company like Tesla Motors – which has now developed a rechargeable battery for home use, which could lead to a sharp increase in the number of households switching to solar power – looks far more attractive.