| 例句 |
humusnoun a brown or black material in soil that is formed when plants and animals decay loam, topsoilclod, dirt, earth, ground, moldblackland, clay, gault(chiefly British), gley, guck(or gook), gumbo, kaolin, muck, muddust, gravel, sandalluvium, colluvium, detritus, loess, marl, sediment, shingle, siltduff, mullsubsoil, substratum in 1796 |