?氮素海鸟粪
... 氮素海鸟粪 guano nitrogen 秘鲁海鸟粪 Peruvian guano 磷质海鸟粪 Phosphatic guano ...
氮素海鸟粪
Between 1840 and 1880, guano nitrogen made a vast difference to European agriculture.
ECONOMIST: The story of man's staple food
英汉双解词典包含3185865条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。