英语词汇“Jacob's staff”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	Jacob's staff
释义	Jacob's staff pl. Jacob's staves. 1. Astron. cross-staff. 2. Survey. a pole providing a firm support for a compass or other instrument. [1540-50]
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