n.博览会，展览会，阐述
His pictures were shown at the Paris exposition of 1878.
他的画在1878年巴黎博览会上展览过.
John gave a very exposition of the facts.
约翰把事实解释得很清楚.
a clear and detailed exposition of their legal position
对他们的法律处境清楚而详尽的说明
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