be economical

• She is economical in her use of salt when cooking
  她烹饪时用盐很少。
• It is economical to only buy clothes that are on sale
  只在大减价的时候买衣服是很经济划算的。
• My new car is economical of fuel
  我的新汽车节省燃料[不费油] 。
• It is economical and convenient to dry up hands with a piece of paper
  一张纸可擦干一双手，经济快捷方便。
• " we won ' t be economical today , " cried bertha , " i feel utterly reckless .
  “咱们今天不要节省， ”伯莎大声说， “我根本不在乎。 ”
• Sometimes expensive drugs or other treatments can be economical in the long run
  从长远看，有时候使用昂贵的药物或其他治疗是很经济的。
• The production process is relatively simple . the finishing period is shorter to be economical
  生产流程比较简单，成型周期短，更具经济效益
• 1 the production process is relatively simple . the production cycle is shorter to be economical
  1生产流程比较简单，成型周期短，更具经济效益
• Sludge treatment systems delivered by dwt are economical , effective and user friendly
  Dwt公司生产的污泥处理系统十分经济、高效并且操作界面友好。
• When we had done the costings on the project , it was clear it would not be economical to go ahead with it
  我们计算了成本,清楚表明这项工程不合算