betulin的翻译，读音
英/'betjulin/
释义：
桦木脑, 桦木醇, 白桦脂醇
n. A substance of a resinous nature, obtained from the outer
bark of the common European birch (Betula alba), or from the tar
prepared therefrom; -- called also birch camphor.
n. A substance of a resinous nature, obtained from the outer
bark of the common European birch (Betula alba), or from the tar
prepared therefrom; -- called also birch camphor.