a very fine-grained soil that is plastic when moist but hard when fired
water soaked soil; soft wet earth
United States general who commanded United States forces in Europe from 1945 to 1949 and who oversaw the Berlin airlift (1897-1978)
United States politician responsible for the Missouri Compromise between free and slave states (1777-1852)
the dead body of a human being
例句
例句
IR, ESR, XRD and some other recent analysis methods have been using in the study of adsorption mechanisms of pesticides on soil humic acids and clays. 土壤中的粘土矿物和腐植酸是对农药吸附的最主要两类活性组份。