help·ful·ness
noun/ˈhelpflnəs/
/ˈhelpflnəs/
[uncountable]- the quality of helping in a particular situation
有用性：在特定情况下提供帮助的质量 - Adult learners rated the helpfulness of various strategies differently.
成人学习者对各种策略的有用性评价不同。
- Adult learners rated the helpfulness of various strategies differently.
- the quality of showing that you are willing to help somebody
有用性：表明您愿意帮助某人的质量 - We were very impressed with the friendliness and helpfulness of the locals.
当地人的友善和乐于助人给我们留下了深刻的印象。
- We were very impressed with the friendliness and helpfulness of the locals.