Aptitude
来自Big Physics
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late Middle English: via Old French from late Latin aptitudo, from aptus (see apt).
wiktionary
Middle French aptitude, from Medieval Latin aptitudo, from Latin aptus(“apt, fit”). Doublet of attitude.
etymonline
aptitude (n.)
early 15c., "tendency, likelihood," from Late Latin aptitudo (genitive aptitudinis) "fitness," noun of quality from Latin aptus "joined, fitted" (see apt). Meaning "natural capacity to learn" is 1540s; that of "state or quality of being fit (for a purpose or position)" is from 1640s. Related: Aptitudinal. A doublet of attitude.
