例句與造句

1. natural growth and artificially controlled density growth models for cunninghamia lanceolata stand in huitong county, hunan province
   杉木林分自然生長和人為控制密度生長模型研究
2. with the development of economy and the increasing of consumption of energy, people set up higher standards to environmental quality, the problem of atmospheric pollution is becoming more and more serious, the method of controlling density had n't adapted itself to the requirement of modern environmental management . then it is one of the most important projects of environmental science to seeking one new ideal path of controlling atmospheric pollution
   長期以來，世界各國對于大氣污染控制主要采用控制污染源排放濃度為核心的環(huán)境管理方法體系，但隨著經(jīng)濟(jì)的發(fā)展和能源消耗量逐年增加以及人們對環(huán)境質(zhì)量愈來愈高的要求，大氣污染問題日益嚴(yán)峻，對大氣污染采取濃度控制方法已不能適應(yīng)環(huán)境管理要求，尋求新的大氣污染控制的理想途徑，是大氣環(huán)境科學(xué)研究十分重要的課題。
3. It's difficult to find control density in a sentence. 用control density造句挺難的