effective need的用法和樣例：
例句
- The development of high-tech industries is faced with some problems, such as relatively insufficient effective demand.
高新技術產業的發展也面臨著一些問題，特別是有效需求相對不足的問題。 - For this reason a proportion of any increase in effective demand is likely to be absorbed in satisfying the upward tendency of the wage-u nit.
因此，有效需求任何增加的一部分就有可能被為滿足工資單位的向上趨勢所吸收。
