cinchona的复数形式怎么写

cinchona的音标：cinchona的英式发音音标为：[sɪŋ'kəʊnə]cinchona的美式发音音标为：[sɪŋ'koʊnə]...

n.（产于南美洲的）金鸡纳树，金鸡纳皮...

Quinine: Alkaloid found in the bark of cinchona trees and shrubs.奎宁: 金鸡纳树皮中的生物碱,主要用于治疗疟疾.Colombian tree; source of Cartagena bark ( a cinchona bark ) .哥伦比亚树种; 卡塔赫 那的金鸡纳树种.Nearby grew a tree, nowadays known as Cinchona.附近...