They form when the air temperature is about fifteen degrees below zero Celsius.

VOA: special.2010.01.05

Last time we reach the third law which is telling us that we can't quite get to zero degrees Kelvin .but that as the temperature approaches zero degrees Kelvin, the absolute entropy of a pure substance in perfect crystalline form is zero.

上次课我们得到了热力学第三定律,这个定律告诉我们我们无法,达到0K的温度,但是在我们接近绝对零度的过程中，以完美晶体形式存在的纯物质的绝对熵,也趋向于零。

麻省理工公开课 - 热力学与动力学课程节选

They form when the temperature is about five degrees below zero.

VOA: special.2010.01.05

"The Court has a zero tolerance policy towards any form of sexual abuses and is handling these allegations with great rigor and caution, " said the ICC in a statement.

BBC: ICC opens sex-abuse investigation against ex-employee

It seems certain that the Federal Reserve will continue to accompany fiscal stimulus with the monetary equivalent in the form of near-zero interest rates and further quantitative easing.

ECONOMIST: A bearish perspective on the market in 2011

Accordingly, a private replacement for Social Security would have to take the form of a fully-inflation-indexed annuity with zero risk of default.

FORBES: Why Americans Are Skeptical About Private Social Security Accounts