Echinacosid
海胆苷
🗣️ 情景例句
He's an aerospace engineer,and works for Orlando Aircraft Corporation.
他担任航太工程师，为Orlando飞机公司工作。
Have you been busy with schoolwork?
学校的功课很忙吗？
Oh dear! You mean I'm too fat? That is a problem! said Mrs Brown.
“天哪！你的意思是说我太胖了吧？这是个问题！”布朗夫人说