Dalembertian
达兰伯算符
🗣️ 情景例句
And thanks for the advice about the house.
也谢谢你关于房子的建议。
Internet is number one!
国际互联网真是顶呱呱！
This is a pity, because noise abatement really is a good cause.and it is likely to be discredited if it gets to be associated with bad science.
要求减少噪音确实是件好事，但是如果与拙劣的科学掺杂在一起的话，就不会被人们所信任，这是很遗憾的。