Narf
abbr. natural axial-resonant frequency 自然轴向共振频率
🗣️ 情景例句
It's no secret my wife is expecting a baby.
我老婆快生孩子了，这又不是什么秘密。
That house is for sale. It has central heating.
此房出售，房子里有供暖设备。
Here is another photograph.
这是另一张照片。