记忆方法
1、un- "not" + a- "to" (see ad-) + -vail- "be worth" + -ing.
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英语词源
- unavailing (adj.)
- "ineffectual, useless," 1660s, from un- (1) "not" + availing. Also see unavailable.
权威例句
- 1. Efforts to reach the people named in the report proved unavailing.
- 联系过报告中所提到的那些人，但都徒劳无功。
- 2. He died after a brave but unavailing fight against a terminal illness.
- 在与绝症进行了一番勇敢但却徒劳的抗争之后，他还是去世了。
- 3. Their efforts were unavailing.
- 他们的努力都付诸东流。
- 4. All our protests were unavailing.
- 我们的抗议全部无用.
- 5. Hurstwood heard the details of the weary and unavailing search that evening.
- 那天晚上,赫斯渥听到了这次劳而无获的寻找的详细情况.