Wdm
abbr. 波分多路复用（Wavelength Division Multiplex）
🗣️ 情景例句
He is an orphan, so he is not sure which family name he should have.
他是个孤儿，因而不知道他自己姓什么。
Touch pitch and you will be defiled.
近朱者赤，近墨者黑。
At high speeds, falling cats have time to relax.
在高速下落中，猫有时间放松自己。