the quality or fact of being useful. "faults that affect the book's usefulness"
noun
[具体名词]
可用；使用方便
The utility model has the advantages of simple structure, usableness and capability of continuously adjusting the height of the bunk bed.
本实用新型的优点：结构简单，使用方便，可以连续调节高低床的高度。
后缀: ness
【noun】 表示状态或质量的性质 - indicating the state or quality of
原词: usableness
是通过后缀 【ness】 构成的派生词
