police sirens 警笛
ambulance sirens 救护车警报声
loud sirens 响亮的警报
emergency sirens 紧急警报
A: Did you hear those loud sirens?
A：你听到那些响亮的警报声了吗？
B: Yes, it must be an ambulance passing by.
B：是的，那一定是一辆救护车经过。
1) 警报器
2) 海妖
3) 具有诱惑力的人或事物
1. 警报器
2. 海妖
noun
1. A device that makes a loud noise, especially to warn people.
In mythology, creatures that lure sailors with their singing.