Echometer
听诊器
🗣️ 情景例句
What was your speciality?
你学的是什么专业？
So far I have been learning about China.
到止前我止，我一直都在研究中国的事情。
Of course. You may find these rather expensive.
当然。不过这些衣服你可能觉得相当贵。