A pilot from virginia removed his son's loose tooth using a helicopter.
2019年6月四级真题(第二套)听力 Section A
柯林斯高阶英汉双解学习词典释义
N-COUNT
直升机
A helicopter is an aircraft with long blades on top that go round very fast. It is able to stay still in the air and to move straight upwards or downwards.
英英词典释义
Noun
1. an aircraft without wings that obtains its lift from the rotation of overhead blades