Phononmaser
声子激射器
🗣️ 情景例句
I'm supposed to be worried about my daughter,
我原该为我的女儿担心才是。
Can you give me a wake-up call?
你能打电话叫醒我吗？
How did the bees know exactly in which diection to fly?
蜜蜂是怎样确切地知道朝哪个方向飞呢？