Praetrsonics
极超短波晶体声学, 特超声(学)
🗣️ 情景例句
Yes. It's a lovely day and good enough to travel.
是的，天气很好，旅游是再好不过了。
What's so funny?
有什么好笑的？
Would you like a cup of tea?
你想喝杯茶吗？