economical
美 [.ekə'nɑmɪk(ə)l] 
英 [.ekə'nɒmɪk(ə)l] 
- adj.经济的;实惠的;节俭的;节约的
 - 网络节省的;经济学的;经济性
 
economical
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1.  | 经济的;实惠的providing good service or value in relation to the amount of time or money spent  | 
an economical car to run(= one that does not use too much petrol/gas) 节油型汽车  | |
It would be more economical to buy the bigger size. 买尺寸大点的更实惠。  | 
2.  | 节俭的;节约的;简洁的using no more of sth than is necessary  | 
an economical use of space 节约利用空间  | |
an economical prose style(= one that uses no unnecessary words) 简练的散文文体  | 
3.  | 精打细算的;省钱的not spending more money than necessary  | 
He was economical in all areas of his life. 他在生活的各个方面都精打细算。  |