单词	backsight
释义	backsight noun 1 surveying : a reading of the leveling rod in its unchanged position when the leveling instrument has been taken to a new position 2 surveying : a sight directed backward to a previous station Word History First Known Use 1847, in the meaning defined at sense 1
随便看	icositetrahedron Icosteidae Icosteus icotype ICRC ics ictaluri Ictalurus ictaluruses ictalurusses icter- icteri icteriae icterias icteric icterics Icteridae icteridaes icterine icterine warbler icteritious icteritous ictero- icterohematuria icterus

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