Before I posted that sign , people kept tripping over him .
在我贴那个标牌前,老有人被它绊倒。
Tripping the pensioner on the stair .
使得老人一下绊倒在楼梯上。
If the great and the good in davos only gaze out into the distant future , they risk tripping over the mess at their feet .
如果达沃斯的大人物只是去眺望遥远的未来,他们可能会被脚下的障碍绊倒。
Or to put it another way , no matter how sophisticated your robot is at avoiding people , people might not always manage to avoid it , and could end up tripping over it and falling down the stairs .