If we want to talk about two hydrogen atoms, then we just need to double that, so that's going to be negative 2 6 2 4 kilojoules per mole that we're talking about in terms of a single hydrogen atom.

而要讨论两个氢原子，我们只需要把它乘以二，因此应该是负的，2624，千焦每摩尔,这就是单个的氢原子的情况。

麻省理工公开课 - 化学原理课程节选

This is the third negative double-digit spread in the past four weeks.

FORBES: Unusually High Level Of Pessimism Plagues Investors

His visual effects company Double Negative is a great success story, with credits on films ranging from Harry Potter to Batman to Inception, for which it won an Oscar.

BBC: Coding - the new Latin

Livingstone and Alex Hope, of Double Negative, were asked to make recommendations to the government to transform the school curriculum to teach people how to program, and not just use, video games.

CNN: Gaming star Lara Croft is back -- but not as you know her