usefulness 核心詞議：
n. 有用；有效性；有益
usefulness 基本解釋
速記方法知識擴展
中文詞源
中文詞源：
usefulness
精選例句
1、 There are doubts about the usefulness of these tests.
這些試驗是否有用，人們有所保留。
常見考點例句：
- So both their use and their usefulness were extremely limited .
- 因此這些檢測的使用和有用性都極其有限。
- The selection of locations also features tongue-in-cheek descriptions so users can assess the usefulness of each category .
- 對區域選擇的說明看上去還挺像回事兒，用戶可以由此進入有用的目錄。
- Usefulness aside , this extension will let you see the date that any user joined the micro-blogging service .
- 撇開是否有用不談，這個擴展能讓你知道這個微博服務中任何用戶的創建日期。
- Usefulness , he said , is a large part of what makes the paper he most admires beautiful .
- 他說，紙之所以如他贊賞的那樣美麗，很大一部分原因是因為紙有用。
- How can this problem be solved by retaining the seemingly usefulness of global variables while keeping to object-oriented programming 's strict standards ?
- 如何這樣解決這個問題：保留這看起來有用的全局變量同時符合面向對象的程序設計的嚴格標準？