Dalembertian
达兰伯算符
🗣️ 情景例句
My name is Wang Feng and I'm calling to cancel plane ticket.
我叫王峰，我想取消我预定的飞机票。
The future belongs to him who knows how to wait.
未来属于懂得等待的人。
I'm very much interested in your personal computers.
我对你们的个人电脑深感兴趣。