requirement n. 1.要求,需要。 2.要求物,必需品;需要量;必要条件,资格 (for)。 the detailed requirements 详细规格。 meet the requirements of the times 适应当时需要。 the first requirement 第一要件。
In software engineering, a functional requirement defines a function of a software system or its component. A function is described as a set of inputs, the behavior, and outputs (see also software).