Velocitron
质谱仪
🗣️ 情景例句
Millie, did you bring the tapes for dancing?
Millie，带来了跳舞的录音带吗？
Is there anyone who can speak English.
请问有没有会讲英语的？
Hello. Can I speak to Zheng Jie, please?
喂，请找郑杰听电话。