effective need的用法和样例：
例句
- The development of high-tech industries is faced with some problems, such as relatively insufficient effective demand.
高新技术产业的发展也面临着一些问题，特别是有效需求相对不足的问题。 - 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为满足工资单位的向上趋势所吸收。
