常見例句雙語(yǔ)例句The characteristics of alfalfa growth in the semi-arid sandy area for different buried depths of underground drip irrigation are studied.研究了半乾旱沙區(qū)不同滴灌帶埋設(shè)深度下紫花苜蓿的生長(zhǎng)特性。The vegetation features and biomass of sandy rangeland in semi-arid area of Yanchi County, Ningxia were studied by means of plot investigation methods since 1991.採(cǎi)用樣地調(diào)查法，對(duì)鹽池縣1991年以來不同時(shí)期的老封育區(qū)、新封育區(qū)和對(duì)照區(qū)進(jìn)行半乾旱沙地草場(chǎng)的植被特征及其生物量比較研究。The reasonable development and utilization of Caragana feed can widen feed resource in arid and sandy area, relieving the stocking pressure on grassland and improve ecological environment.檸條飼料郃理開發(fā)利用可以拓寬乾旱沙區(qū)飼料資源，緩解草原壓力，改善生態(tài)環(huán)境。 返回 arid sandy area