presidencyn.
英 'prezɪd(ə)nsɪ | 美 'prɛzɪdənsi
中文n. 总统（或董事长、会长、大学校长等）的职位（任期）；管辖；支配
词根词源
presidency (n.)1590s, "office of a president," from Medieval Latin praesidentia "office of a president" (mid-13c.), from Latin praesidentem (nominative praesidens) "president, governor" (see president). Earlier in same sense was presidentship (1520s). Meaning "a president\\'s term in office" is from 1610s.
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