on foot/on one's feet

on foot 作“步行”解：

1. They drove, but we came on foot. (MD) 他们是开车来的，而我们是步行来的。

2. My bicycle is broken, so I'll have to go on foot. (LDAE) 我的自行车坏了,所以我不得不步行。

3. Always we went on foot. (Wells) 我们总是步行。

此外, on foot 还作“在筹划之中”“(计划)在进行”解:

1. The reporter said that a civil rights demonstration was on foot. (DAI) 记者报导说正在计划举行一次民权示威游行。

2. A plan's on foot to invite the Minister of Health to visit our hospital. (LDCE) 邀请卫生部长来访问我们医院的计划正在着手进行。

on one's feet 则作“站着”“站起来”“痊愈”“经济独立”解：

1. A dentist is on his feet all day. (MD) 牙科医生整天站着。

2. The Minister was on his feet at once to answer the charge. (ALD) 部长立即站了起来,答复那个指控。

3. The medicine will soon have you on your feet again. (LDCE) 这种药很快就会使你复原的。

4. She is on her feet. 她在经济上是独立的。

5. After his wife's death it took him two years to get back on his feet. (ALD) 他妻子死后两年，他才振作起来。