Rahim tied one end of a string around his son's tooth, and the other end to his full-sized commercialhelicopter.
拉希姆把一根绳子的一端系在儿子的牙齿上，另一端系在他的全尺寸商用直升机上。
2
Commercial Pilot Test Prep 2003: Study and Prepare for CommercialHelicopter (etc) Competency FAA Knowledge Tests ;
商用试验备战2003年：研究和准备商用直升机（等）的能力联邦航空局知识测试 ；
3
Over the years, Gruner has maintained his demanding physical regimen and learned new skills including surfing and becoming a commercialhelicopter pilot.