At sufficiently high temperatures and alkalinity, fatty esters may be hydrolyzed to produce soaps.在足够的温度和碱度的情况下, 脂护酯可能被水解产生皂类.Incorporating organic material into chalky soils will reduce the alkalinity.在白垩质土壤中添加有机物可降低其碱性...
Incorporating organic material into chalky soils will reduce the alkalinity.在白垩质土壤中添加有机物可降低其碱性。A pH test measures the acidity or alkalinity of a substance.pH值测试可检测物质的酸碱度。As a result, soil alkalinity rose and farmland lay...
hostile faces smirched by the grime and rust敌视、沾满污垢和铁锈的脸His face and hands were coverd with grime from the coal dust.他的脸和双手都沾满了煤灰和污垢.a face covered with grime and sweat满是污垢和汗水的脸Kelly got the grime off his hands before re...