总结一下的例子，可以得出大概有个意思。
1.坚持某人的态度(或主张)
2.固执己见，坚决，坚持
3.猛踩油门加速
4.阻止某人的行为
5.退却/让步
6.把脚向下伸
She put her foot down and left home with the baby. 她固执己见,带著孩子便离家了。
Jane got afraid when Bob put his foot down. 鲍伯加快了车速,珍很担心。
I put my foot down and the Zephyr gathered speed up the slope. 我踩大油门，西风牌汽车加速爬上了斜坡。
She put her foot down and leave home with the baby. 她固执己见，带着孩子便离家了。
Now is the time to put your foot down. 现在是你坚持自己立场的时候了。
She put her foot down and roared past them. 她猛踩油门，从他们旁边呼啸而过。
She put her foot down and the car roared away. 她踩下油门，车子呼啸而去。
We have to put our foot down on that. 我们必须阻止那件事。
Yes,"she says."It's time someone put her foot down. 没错,“她说。“总得有人出来插把手。
Put your foot down where you mean to stand. 退却有限度,不能一味让步。
My husband wanted to buy a puppy, but I would have to look after it so I put my foot down and said No. 我丈夫想买一条小狗，但我得照料它，因此我坚持不同意。
He put his foot down and the truck gathered speed up the slope. 他踩大油门，卡车加速爬上斜坡。
He put his foot down and tried to overtake the car in front. 他脚踩油门加快速度，企图超过前面的一辆汽车。
I shall have to put my foot down and stop this nonsense. 我必须采取坚定的态度，制止这一荒谬的事情。
My son didn't want to be doctor; but my husband put his foot down. 我儿子不想当医生，但我丈夫坚决主张他这样。
Bail out that water and you can put your feet down. 你把水汲出去吧。那么你的脚就可以往下伸了。
You've got to put your foot down and make him stop seeing her. 你得坚决制止他再见她。
John didn't want to practise his piano lesson,but Father put his foot down. 约翰不想练钢琴，但父亲坚持要他练。
John didn't want to practise his piano lesson,but Mother put foot down. 约翰不想练钢琴，但母亲坚持要他练。
Mary didn't want to practise her piano lesson,but Father put his foot down. 玛丽不想练钢琴，但父亲坚持要她弹。
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