Rdf
无线电测向器, 无线电定向仪, 无线电探问, 无线电测向
🗣️ 情景例句
Nothing ventured, nothing gained.
不入虎穴，焉得虎子。
It's up to us to help those in need.
我们有责任帮助那些有困难的人。
he always insisted that it should be written out in full.
但他还是坚持要求将信的全文写在信纸上。