id	keyword
american_scientific_journal-3507	𝐷𝐷 �
american_scientific_journal-3507	𝐿𝐿 �
american_scientific_journal-3507	𝑄𝑄 𝐷𝐷
american_scientific_journal-3507	transport
american_scientific_journal-3507	� �
american_scientific_journal-3507	solute
american_scientific_journal-3507	𝑗𝑗+1
american_scientific_journal-3507	equation
american_scientific_journal-3507	soil
american_scientific_journal-3507	numerical
american_scientific_journal-3507	laplace