Mozart, whose surface gracefulness often masked fundamentally dramatic ideas, was the premier Classical-era concerto composer.

莫扎特是第一个古典协奏曲作家，其外在的优雅常常会隐藏他的戏剧智慧。

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Two important solo works nonetheless date from the Classical era: Joseph Haydn's Concerto in E-flat for trumpet and orchestra (1796) and Johann Nepomuk Hummel's Concerto, also in E-flat (1803).

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Marx, much like the classical economic thinkers of his era, knew that for money values to be stable, they would have to be defined in terms of gold.

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The post-1914 era was no gold-standard period, certainly not in the classical sense of there being adhered-to, multi-lateral consensus about sticking to gold conventions.

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