Optical amplifier
[计] 光放大器
🧩 词语组成解析
🗣️ 情景例句
He didn't get a thing to eat.
他什么也没有吃。
I meet the boy whose aunt is a model.
我遇到那个男孩的姑妈是模特。
so America and the EU have been trying to reach a deal which would eliminate the need to double-test many products.
美国和欧洲一直在寻求达成协议，以便为许多产品取消双重检查。