The "six" in the expression comes from the six feet that make up a fathom which is a little less than two meters.

VOA: special.2009.05.24

I was watching him and he was putting his feet up on the desk,

上次我注意到，他把脚放到办公桌上。

Is there 实战 - SpeakingMax英语口语达人

In fact, his friends-- it went through his head, went--ended up 100 feet away, covered with brains and blood.

事实上,他的朋友们,钢管穿过了他的脑袋,飞出一百多英尺,浑身是脑浆和血

耶鲁公开课 - 心理学导论课程节选

The "six" in the expression comes from the six feet that make up a fathom -- which is a little less than two meters.

VOA: special.2011.03.06

He's a man up in the air you know he's so detached he doesn't have his feet on the ground.

他是个生活在空中的人,十足超然,从不脚踏实地。

耶鲁公开课 - 政治哲学导论课程节选

They place their hands and feet in the cracks and then work their way up.

VOA: special.2009.01.07

What that is, is an organ pipe of the type of organ that we have over in Woolsey Hall, thirty-two feet tall, this gigantic sound of down there so that's what he's trying to set up.

这是一种管风琴,梧希音乐厅就有,三十二英尺高,巨大浑厚的低音,正是施特劳斯努力展现的

耶鲁公开课 - 聆听音乐课程节选

Down two and a half. Kicking up some dust. Thirty feet.

VOA: special.2009.07.15

thirty-six feet per second up. Very smooth, very quiet ride."

VOA: special.2009.07.15