economic span的意思|示意
美 / ˌɪkəˈnɔmik spæn /
英 / ˌɛkəˈnɑmɪk spæn /
经济跨度
economic span相关例句
Finally, the economic span of small tractors in Gansu Province was obtained by the model.
最后用此模型得出了甘肃省小型拖拉机的经济寿命.
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