Radiogen
放射物(质)
🗣️ 情景例句
She's coming over this morning to help me with my math.
她今天早晨要过来帮我补习数学。
How did you sign the letter?Did you write, sincerely yours?
你怎么签名信的?你写了"真诚地你的"？
How many musicians are you bringing?
你打算带多少乐师来？