That day Boeing 737 got into a spin, made a barrel-roll, did some dives and happily got out, then experienced both engines fail, but succesfully glided down to the major airport.
那天波音737旋转、翻滚、几次跳水和幸运脱离，随后飞机引擎失灵，但最终成功滑翔到主要机场。
2
When the barrel began to roll, the shepherd cried, "I am quite willing to be mayor."
当桶开始滚动时，牧羊人喊道：“我很愿意当镇长。”
3
Avoid high stress concentrations at the ends of the work rollbarrel. Ensure good control of roll bending.