When that flow is interrupted, we feel the pain in short supplies and higher prices, At the same time, we derive massive economic benefits when we buy the most affordable energy on the world market and when we engage in energy trade around the world.
出自-2014年6月阅读原文
The derived happiness from the constructive work.
出自-2013年6月听力原文
At least, you are making use of your money, and hopefully deriving value and pleasure from it.
出自-2010年12月听力原文