罗伯特失足滑下了河岸。Robert lost his footing and slithered down the bank.我知道萨拉一失足就会没命了。One false move and I knew Sarah would be dead.他的航海教练在一次训练课时从船上失足跌入水中，溺水身亡。His sailing instructor fell overboard and drowned during a lesson....
I left my car in a lay-by and set off on foot.我把车留在路侧停车带，徒步而行。In a pinch, you could get home on foot.在万不得已时, 你可以步行回家.Some people came by car, others came on foot.有些人是坐汽车来的, 其他的是走着来的....