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bipinnate adj.【植物;植物學】(復葉)二回羽狀的,兩羽狀的。

biplane

Leaves bipinnate , 10 - 25 cm long , usually with 2 pairs of pinnae , rachis often ending in a tendril ; pinnae with 2 - 4pairs of leaflets and terminal tendrils ; leaflets opposite , oblong or long obovate , 3 - 9cm long , 1 . 5 - 4cm wide , apex obtuse or emarginated , base slightly oblique 葉為二回羽狀復葉,長10 - 25厘米,葉軸先端常變為?須,羽片通常2對,頂生1對羽片變為?須;小葉2 - 4對,對生,長橢圓形或長倒卵形,長3 - 9厘米,寬1 . 5 - 4厘米,先端鈍、微凹,基部略偏斜。