制约

• Their materials costs are largely governed by prices on world markets for fuels and ores .
  物料成本在很大程度上受世界市场燃料和矿产价格的制约。
• The quest by private firms for profits takes place under familiar conditions of constraints .
  私营企业对利润的追求是在我们熟悉的制约条件下发生的。
• Without striving to imitate her mother, young simone was conditioned by her .
  西蒙在年轻的时候不是尽力模仿母亲，只是受到来自母亲方面的无意识的制约。
• These tastes and incomes constrain how the quantity demand will react to changes in price .
  这些偏好和收入制约了数量的需求怎样对价格的变动作出反应。
• The attitude of america toward this boy regulated his most intimate dealings with his own kind .
  美国对这孩子的态度制约着他对本民族人民最亲密的关系。
• Probably density-independent factors are more important at the edge of the range of a species .
  可能，在某物种的分布区的边缘，非密度制约因素最为重要。
• Export controls are subject to the practical problems already mentioned, as well as some more of their own .
  出口控制受到上述实际问题和它本身一些问题的制约。
• Once again, the "soft" nature of these constraints has prevented their inclusion in formal models .
  这的制约因素的“伸缩”性质再一次使它们不能包括在正式模型里。
• It was once widely believed that living organisms might be exempt from the second law of thermodynamics .
  人们曾一度广泛相信，活着的有机体不受热力学第二定律的制约。
• There are as well as density-dependent biological factors such as disease, predation, and intraspecific competition .
  还有密度制约的生物因素，诸如病害、捕食和种内竞争等。