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
造句
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. 土壤中的粘土礦物和腐植酸是對(duì)農(nóng)藥吸附的最主要兩類活性組份。