Ofa
光纤放大器（optical fiber amplifier）
🗣️ 情景例句
to be with people--people his own age.
和别人交往像他那般年纪的人。
I hope you're enjoying your stay here.
我希望你在这里过得愉快。
the total absence of fishing boats around the oil rigs.
钻井平台周围根本没有捕鱼船只。