Piontherapy
π介子治疗
🗣️ 情景例句
He is still unable to express himself in English.
他仍然不能用英语表达自己的意思。
There is nothing to thank me for.
没有什么可谢我的。
Grandma is ill, she said. I must take her to hospital.
“奶奶病了，”她说，“我必须送她去医院。