34.of foot<古>行动上；行动时
a creature at one with the environment, soft of foot, sharp of ear and eye一种与环境融为一体的生物, 步履轻盈, 眼明耳聪
fleet of foot步履轻捷
35.on foot
(walking or running)步行；走；跑
She did not take the car, but went on foot.她没开车, 是走着去的。
(afoot)在进行中
Plans had for some time been on foot to extend the work in Canadian history.拓展加拿大历史研究工作的计划已经实施一段时间了。
36.to put your best foot forward<过时>(do your best)尽最大努力；全力以赴
It's time to find some direction and to put your best foot forward.你该确立目标并为之奋斗了。
(hurry)全速前进