“Without a lot of renewables, the business model for CAES is not that strong,” Holst said.

“如果没有大量可再生能源，CAES的商业模式就不强，”霍尔斯特说。

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"Without a lot of renewables, the business model for CAES is not that strong," Holst said.

“如果没有大量可再生能源，CAES的商业模式就不强，”霍尔斯特说。

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“It's a nice idea,” says Cecilie Holst, one of the employees, “making solar panels with clean energy.

工厂的一位职员塞西尔•赫尔斯特讲道，“用洁净能源制作太阳能电池板是一个不错的想法。”

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Before becoming a music teacher and composer, Holst, who was from Cheltenham, had been a professional trombonist.

BBC: Composers' trombones played again

As a composer Holst is most famous for his orchestral suite The Planets.

BBC: Film about composer Holst found

Dr Holst said it had been feared that artificially boosting levels of a natural body chemical could cause problems.

BBC: Diabetes hormone treatment hope