Betuloside
桦木糖苷, 白桦苷
🗣️ 情景例句
When's the next class?
下一次上课什么时候？
To wave your arms
振臂，挥手
Our next obstacle was a shallow pool of water about half a mile across.
下一个障碍是一片约半英里宽的浅水塘。