Ofa
光纤放大器（optical fiber amplifier）
🗣️ 情景例句
Mrs. Ellen Stewart has taken an early lead.
Ellen Stewart太太初步领先。
Better to do well than to say well.
说得好不如做得好。
Many people in industry and the Services, who have practical experience of noise,regard any investigation of this question as a waste of time;
在工业部门工作和在军队中服役的许多人对噪音有切身的体会，他们认为对这个问题进行调查是浪费时间，