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来源:雅诚德英语网
In the early 20th century, the world's growing population couldn't find enough ammonia to fertilize all its crops.
二十世纪初,世界人口不断增长,到足够的氨可以让耕地更加肥沃。
In the early 20th century, the world's growing population couldn't find enough ammonia to fertilize all its crops.
二十世纪初,世界人口不断增长,到足够的氨可以让耕地更加肥沃。