常見(jiàn)例句雙語(yǔ)例句Scientists recently studied the effects of mechanical thinning on two kinds of pecan trees in the southeastern United States.研究人員最近研究了機(jī)器脩剪對(duì)美國(guó)東南部?jī)煞N山核桃樹(shù)的影響。原聲例句Scientists recently studied the effects of mechanical thinning on two kinds of pecan trees in the southeastern United States. 返回 mechanical thinning