Dscf
[医][=Doppler-shifted constant frequency]多普勒转换频率常数
🗣️ 情景例句
Mid-autumn Festival is a traditional festival for family unification.
中秋节是家人团聚的传统节日。
Sorry, it's broken. You have to use the stairs.
对不起，它坏了，你只能走楼梯了。
Because my father wanted to work in China.
因为我父亲想要在中国工作。