The experimental device, unveiled Friday, is designed to support bodyweight, reduce stress on the knees and help people get up steps and stay in crouching positions.

• 周五面世的这种实验装置，是专门设计用来帮助体重过重的人们，它可以减少对膝盖的压力，协助人们上抬起步伐以及保持蹲下状态。原文