英语词汇vail²怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	vail²
释义	vail² /veɪl/ vi.& vt. \| n.〈古〉 I vi.& vt. (对…)有用；有利(于)；有助(于) II n. 小费；(尤指客人离去时给主人家仆人的)赏钱 [< OFr vaille- < valoir to be of worth < L valere; 见 AVAIL]
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