# usefulness
##### 词义
- 英:/ˈjuːsflnəs/; 美:/ˈjuːsflnəs/
- #词性/n 有用;实用;可用性
##### 例句
- There are doubts about the usefulness of these tests .
- 这些试验是否有用,人们有所保留。
- The attitude of the parents toward the usefulness of what is learned must colour the way children approach school .
- 父母对学知识是否有用的态度必定会影响孩子对待学业的态度。
- The building has outlived its usefulness .
- 这座楼房已超过使用年限了。