Thd
abbr. 双头龙（Two Heads Dragon）；总谐波失真（Total Harmonic Distortion）；螺纹（thread）
🗣️ 情景例句
that Grandpa Philip bought for him.
祖父Philip给他买的。
Nothing so bad, as not to be good for something.
塞翁失马，安知非福。
Was that the 21st?
21号吗？