1. They choppered from Nanjing to Shanghai. 他们乘直升机从南京去了上海。
2. They all board the chopper en route to safety. 他们一家人登上了直升机，飞向安全地点。
3. The chopper was carrying a one-year-old patient and three other people, all died. 直升机运出了一名一岁的病人和其他三个人，他们全部死亡。
1. a grounder that bounces high in the air
2. informal terms for a human `tooth'
3. an aircraft without wings that obtains its lift from the rotation of overhead blades
4. a butcher's knife having a large square blade