Bbn
宽频带噪声（broad band noise）
🗣️ 情景例句
The boxes of presents.
那些礼物盒。
Hush! Talk quietly.
嘘！请小声讲话。
and an American-made dialysis machine needs the EU's okay before is hits the market in Europe.
而美国制造的透析仪也要得到欧盟的首肯才能进入欧洲市场。