Ofa
光纤放大器（optical fiber amplifier）
🗣️ 情景例句
Philip, I took Michelle to a school play
Philip,我带Michelle看过学校演出的
Of two evils choose the least.
权衡两害，取其轻者。
I think so. But he seemed rather tired last night.
我想睡得好。但昨晚他看起来有点累。