Optical amplifier
[计] 光放大器
🧩 词语组成解析
🗣️ 情景例句
and tell him you're coming?
告诉他你要去吗？
Don't whistle until you are out of the wood.
没有脱离险境，不要过早高兴。
It is a very modern house, so it looks strange to some people.
它是一栋非常现代化的住宅，因此在有些人看来很古怪。