If you use a vacuum pump to pump hard on the Helium, the boiling point will go even lower, and you can go to nearly two degrees absolute.
如果你用真空泵用力抽氦气，沸点会更低， 可以达到近两度的绝对值。
英语百科
Once Upon a Time (The Prisoner)
（重定向自Degree Absolute）
"Once Upon a Time" is the title of the 16th episode of the British science fiction-allegorical series, The Prisoner, starring Patrick McGoohan as Number Six. It originally aired in the UK on ITV on 25 January 1968 and was first broadcast in the United States on CBS on 14 September 1968.