Hvt
半值厚度辐射屏蔽
🗣️ 情景例句
No. Will you also initial this change on page 2, please?
不，请你也在第二页变更处签姓名的一个字母好吗？
Music washes away from the soul the dust of everyday life.
音乐可洗去灵魂中日常生活所沾染的污垢。
You have a good sense of humor.
你真幽默。