Solanidane
龙葵次碱烷
🗣️ 情景例句
I'm thirty.
我三十岁。
Did you go to the park yesterday?
你昨天去公园了吗？
Now, this is the chemistry lab. Have you been in this lab before?
好啦，这是化学实验室。你们以前到过这个实验室吗？