Deutoxide
重水
🗣️ 情景例句
You may be offered coffee, and then you should immediately announce the reason for your visit.
他们会给你冲咖啡，然后你应该尽快说明来意。
What is th boarding time?
何时登机呢？
The sudden barking frightened Clara.
突然的狗叫声吓坏了克拉拉。