usefulness

n.

有用，有益，有效；效能；

1. It is of the greatest usefulness.
   它是极有用的。
2. This tool has even more usefulness than that.
   这个工具比那个更有用。
3. The duality of use value refers to its usefulness and rarity.
   使用价值的两重性指的是有用性和稀少性。

Usefulness of diffusion-weighted MRI with echo-planar technique in the evaluation of cellularity in gliomas.
Clinical usefulness of chemotherapy based on an in vitro chemosensitivity test in urothelial cancer patients
The Kindness of Strangers: The Usefulness of Electronic Weak Ties for Technical Advice
On the Use, Usefulness, and Ease of Use of Structural Equation Modeling in MIS Research: A Note of Caution
On the use, usefulness, and ease of use of structural equation modeling in MIS research: a note of caution
Clinical usefulness of very high and very low levels of C-reactive protein across the full range of Framingham Risk Scores.
Usefulness of the Medical Research Council (MRC) dyspnoea scale as a measure of disability in patients with chronic obstructive pulm...
Extensions of net reclassification improvement calculations to measure usefulness of new biomarkers
Guyatt G, Walter S, Norman G. Measuring change over time: assessing the usefulness of evaluative instruments. J Chron Dis 40, 171-178
Difference between liver and spleen CT numbers in the normal adult: its usefulness in predicting the presence of diffuse liver disea...