The word "usefulness" refers to being useful, beneficial, or effective. It is a noun and is listed with a vocabulary index of 10136 in the Oxford 3000 word list.
单词“usefulness”的意思是有用、有益或有效性。它是一个名词，在牛津3000词汇表的词汇序号是10136。
| 单词 | usefulness |
|---|---|
| 发音 | ['juːsf(ʊ)lnəs] |
| 释义 | n. 有用；有益；有效性 |
| 词序 | 10136 |
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