n.大片土地；（神经纤维的）束；小册子；一段时间，长时间 变形： 复数：tracts 双语释义：n.(名词)[C]大片土地；地带 large stretch or area of land[C]道，束 system of connected tube-like parts along which sth passes英英释义： tract[ trækt ]n.an extended area of land同义词：piece of landpiece of groundparcel of landparc