单词 | top soil |
例句 | DEFINITIVE EXAMPLES 权威例句〔leach〕The calcium, potassium, and magnesium ions are leached or washed out of the top soil into lower inaccessible subsoil.钙、钾和镁离子被滤出表层土壤流入低层土壤却无法被吸收。剑桥高阶 |
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