Ultron
波导耦合正交场放大管
🗣️ 情景例句
Did they write some bad news?
他们写了什么坏消息吗？
By doing nothing we learn to do ill.
懒散学为非。
He is now satisfied merely to try to stand up, but as soon as he does so a porpoise knocks him flat.
此时的海龟，只要能站起来就满足了，但它刚站起来，就被一只海豚击倒。