| 1 | I awoke to find myself at the bottom of a pit without any known means of scaling its sheer sides. | |
| 2 | 戴尔博士说鸟儿做这些动作并不是试着去飞行而是承担着像赛车上副翼的作用：使其身体保持在地面上以能用脚产生更多的力气去爬陡壁。 This is not to try to fly, Dr. Dial said, but to serve the same role as a spoiler on a race car: to keep the bird on the ground so it can generate more force with its feet and climb steep walls. | |
| 3 | 戴尔博士说鸟儿做这些动作并不是试着往飞行而是承担着像赛车上副翼的作用：使其身体保持在地面上以能用脚产生更多的力气往爬陡壁。 This is not to try to fly, Dr. Dial said, but to serve the same role as a spoiler on a race car: to keep the bird on the ground so it can generate more force with its feet and climb steep walls. | |
| 4 | To climb a vertical surface, and to find points of support where hardly a projection was visible, was play to Jean Valjean. | |
| 5 | Mechanical ascenders can be handy for ascending fixed lines on big peaks, but are not a suitable alternative to prusiks as shown here because their sharp teeth could damage a rope during a big fall. |
