usefulness

名詞

1. 1

   用處、實用性、有用

   The new software proved its usefulness within the first week.

   這個新軟體在第一週就證明了它的實用性。

2. 2

   效用、價值

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

   這台舊印表機已經沒有利用價值了，應該換掉。