piv·ot·al /ˈpɪvətḷ/
(a.)樞軸的,關鍵的
Piv·ot·al a. Of or pertaining to a pivot or turning point; belonging to, or constituting, a pivot; of the nature of a pivot; as, the pivotalopportunity of a career; the pivotal position in a battle.
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pivotal
adj : being of crucial importance; "a pivotal event"; "Its pivotal
location has also exposed it to periodic invasions"-
Henry Kissinger; "the polar events of this study"; "a
polar principal" [syn: polar]