ac·cliv·i·ty /əˈklɪvəti, æ-/
向上的斜坡
Ac·cliv·i·ty, n.; pl. Acclivities A slope or inclination of the earth, as the side of a hill, considered as ascending, in opposition to declivity, or descending; an upward slope; ascent.
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acclivity
n : an upward slope or grade (as in a road); "the car couldn't
make it up the rise" [syn: ascent, rise, raise, climb,
upgrade] [ant: descent]