Ofa
光纤放大器（optical fiber amplifier）
🗣️ 情景例句
but I wanted this weekend to be special for you.
但我希望这个周末对你来说很特别。
Laugh before breakfast you'll cry before supper.
乐极生悲。
A Frenchman, for instance, might find it hard to laugh at a Russian joke.
譬如，法国人听完一则俄国笑话可能很难发笑。