an alkaloid extracted from the plant Rauwolfia serpentina (trade names Rau-Sed or Sandril or Serpasil) and used to treat hypertension.是什么意思_an alkaloid extracted from the plant Rauwolfia serpentina (trade names Rau-Sed or Sandril or Serpasil) and used to treat hypertension.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句