Echinacosid
海胆苷
🗣️ 情景例句
I ate something bad, and now I've got the runs.
我吃了些变质的东西，所以现在拉肚子。
No, I only wrote her one letter this year.
是的，今年我才给她写过一封信。
I think she's twelve.
我想她十二岁了。