什么是 leach?To remove soluble or other constituents from by the action of a percolating liquid.To empty; drain: "a world leached of pleasure, voided of meaning” ( Marilynne Robinson). To be dissolved or passed out by a percolating liquid.The act or process of leaching.A porous, perforated, or sievelike vessel that holds material to be leached.The substance through which a liquid is leached.