zone at risk

• 危险区

zone at risk的用法和样例：

例句

1. Gas-masks had been issued to everyone before they entered the danger zone.
   在他们进入危险区之前，每人都发了防毒面具。
2. Any time you need to shout to be heard by someone near you, your hearing is most likely to be in a decibel danger zone.
   任何时候你为了让旁边的人听到你都需要大声喊叫，这时候你的听力都很可能处于一个分贝危险区。