economically sound短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 un.经济上有利的 So they are developing economically sound weaponry, what could be described as environmentally friendly fire. 因此，他们正在发展经济型武器，我们可以称之为“环保军火”。 kekenet Mr. Smith's scheme seems not economically sound. 史密斯先生的计划在经济上欠妥。 jxjy.ecust.edu.cn