形容词
中文翻译：经济的
同义词：
['costly', 'frugal', 'prudent']
例句：
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1.The new car is economical to run, so it's a good choice for our family.
这款新车运行成本低，是我们家庭的一个好选择。
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2. The economist predicted that the economy would recover quickly.
这位经济学家预测经济将会迅速复苏。
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3. She was always frugal with her money, never spending more than she earned.
她总是精打细算，从不超出自己的收入消费。