Photophone
n. 光线电话机, 光音机\\n[医] 光音器
✅ 同义词
🗣️ 情景例句
Okay. Thank you.
好的，谢谢。
Don't mind him.
别理他！
suggested an idea on which he had been working for many years to the British Government and industrial circles.
他向英国政府和工业界提出了他研究多年的一项计划。