economical
adj
careful in the spending of money, time, etc and in the use of resources; not wasteful 经济的; 节俭的; 省时间的; 节约的
an economical car to run, eg one with low petrol consumption 节油汽车
She is economical with/in her use of salt when cooking. 她烹饪时用盐很省.
an economical style of writing, ie one that does not waste words 简练的写作风格(不多费笔墨者).