usefulness

名词

1. 1

   用处、实用性、有用

   The new software proved its usefulness within the first week.

   这个新软体在第一周就证明了它的实用性。

2. 2

   效用、价值

   The old printer has outlived its usefulness and should be replaced.

   这台旧印表机已经没有利用价值了，应该换掉。