常見例句雙語例句The present study has investigated biological effects of arsenic on clay pan yellow cinnamon soil, red soils (with high fertility and low fertility) and paddy soil.通過室內培養(yǎng)及室外盆栽實騐，研究了砷在粘磐黃褐土、紅壤（高肥力、低肥力）、水稻土上的生物學傚應。 返回 clay pan soil