boot strap

同根派生

Pull yourself up by your own boot straps.
振作靠自己。
He had to drag himself up by his boot straps.
他只好自力更生，独立奋斗了。
The status of development of the technology of environmental control system(ECS) for avionics pods was introduced, a new type re cool reverse boot strap ram air circle cooling scheme of ECS for pods was brought forward.
介绍了国外机载设备吊舱环境控制系统技术发展的状况 ;提出了一种新的回冷逆升压式冲压空气循环制冷的吊舱环控系统方案 .
A boot strap driving method based on the constant current resource
一种基于恒流源原理的自举驱动方法
The strap had been fretted away.
皮带已经被磨损了。