compost
/ˈkɔmpɔst; `kɑmpost/ n[U, C]
mixture of decayed organic matter, manure, etc added to soil to improve the growth of plants 混合肥料; 堆肥. compost, v [Tn]
(a) make (sth) into compost 将（某物）制成堆肥
composting the kitchen waste 用厨房里的垃圾制堆肥.
(b) put compost on or in (sth) 给（某物）施堆肥
compost the flower-beds 给花坛施堆肥.