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单词 Jacob's staff
释义 Jacob's staff/ˈdʒeikəbz/n. 1 a surveyor's iron-shod rod used instead of a tripod (用以代替三角架的)独脚罗盘支杆 2 an instrument for measuring distances and heights 测距器,测高器 [from the staffs used by Jacob, as described in Gen. 30:37 43]
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