乾隆时期,中国的社会经济虽然取得了很大成就,但粮食短缺却成为日益严重的社会问题。
In The Times of Qianlong emperor, China had obtained great achivement in the social economy, but the grain shortage became a more and more serious social problem.
在许多国家里,生产性表土的流失已导致日益严重的粮食短缺。
In many countries the loss of productive topsoil has contributed to growing food deficits.
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