求分析一句句子结构

ctjboy

麻烦大家帮我分析一下这句句子的结构，看了有点晕。
In terms of physics, the chaaracteristic feature of the roller coaster is that the cars' potential energy, gained as a chain drive lifts them through the Earth's gravity to the top of the first drop, has been converted to kinetic energy by the time the ride ends.

eshopaholic

主要结构：the feature of the roller coaster is that.....

表语从句主要结构：the car's potential energy has been converted to kinetic energy