单词	cross-staff
释义	cross-staff noun ˈkrȯs-ˌstaf  : an instrument formerly used at sea for taking the altitude of a celestial body Word History First Known Use 1582, in the meaning defined above
随便看	perpends perpension perpents perper perpera perpers perpetrate perpetrated perpetrates perpetrating perpetration perpetrations perpetrator perpetrators querk querken querl quern querns quernstone quernstones quersprung querulential querulist querulous

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