Lau
abbr. 局域网接入单元（LAN Access Unit）；线路适配器单元（Line Adapter Unit）
🗣️ 情景例句
We will also need a letter of recommendation.
我们还要求一封推荐函。
Why aren't you happy?
为什么无聊呢？
she has to help with the washing.
她得帮忙洗衣服。