Delegates in Spain hit a major stumbling block Tuesday when the African group pulled out of some climate talks, saying rich nations are not doing enough to tackle climate change.

VOA: standard.2009.11.04

The real issue is to figure out how to build constructs out of this that tackle particular problems, but the fundamental basics of computation are just captured in that set of mechanisms.

坏消息是当然这不是真的,真正的问题是怎么来,构建解决特定的问题的这些结构，但是运算的最基本的东西,仅仅体现在机制集里。

麻省理工公开课 - 计算机科学及编程导论课程节选

Ospreys did manage to haul themselves back before half-time though, Bowe doing good work out of the tackle to gift a try to Byrne.

BBC: Ospreys 30-32 Edinburgh

After winning a decisive reelection victory Tuesday, President Barack Obama told thousands of supporters in Chicago that he would reach out to leaders of both parties to tackle the hard issues that faced the country in the wake of a fiercely partisan campaign and against the backdrop of a divided congress embroiled in a historic budget battle.

FORBES: In Victory Speech, Obama Calls For Cooperation: 'We Are Not As Divided As Our Politics Suggest'

But environmentalists have complained of a lost opportunity, saying the world is running out of time to tackle the problem.

CNN: G8 backs climate-change science, sets no hard goals