常見例句雙語例句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器修剪對美國東南部兩種山核桃樹的影響。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