Subsonics
亚音速
🗣️ 情景例句
He's a lucky boy.
他是个幸运的孩子。
We never imagined that John would become a doctor.
我们从来没想象约翰将成为一位医生。
because this is easier to shape than other kinds.
因为燧石较之其他石头更容易成形。