One of Ericsson's central findings is that practice is not only the most important ingredient in achieving excellence, but also the most difficult and the least intrinsically enjoyable.

在爱立信的主要的发现外，他还发现这种学习不仅是成功要素，同时也是最难做到，最没有乐趣的事。

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Informed consumers, after all, are a central ingredient of a successful free market.

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Prosecutors said this was the first time this method of producing benzyl methyl ketone (BMK), a central ingredient for amphetamines, had been seen in Europe.

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The central issues remain the employment picture and housing, which are core ingredient necessary to stoke an economic recovery.

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