single sling

例句：

1. 1. The team used a singlesling to lift the heavy box.
   团队使用一根单臂吊索来举起沉重的箱子。
2. 2. He was able to climb upthe ladder with only one hand using asingle sling.
   他只用一只手，通过一根单臂吊索就能爬上梯子。
3. 3. The rescuers used a singlesling to lower the injured person downsafely.
   救援人员用一根单臂吊索安全地将受伤的人放下。