The study considered four possible world temperature rises.

这项研究考虑了四种可能的全球气温上升。

Which is probably the worst of all possible worlds. - I'm sorry.

那是世界上最可怕的事。-对不起。

What possible worlds might we create if we thoughtfully plan for an older, smaller population?

我们可能会创造出一个什么样的世界，如果我们能够提前对更加老龄化、更少的人口做出周全的计划？

In one possible world, we put our heads in the sand and keep going about our business as usual.

一种可能是我们把头埋进沙子里，社会继续照常运作。

Twelve possible worlds, twelve Ranger launches carrying the bravest humans ever to live led by the remarkable Dr. Mann.

十二个可能的世界，十二架漫游者飞船载着最勇敢的人，由了不起的 Mann 博士带队。

Which is probably the worst of all possible worlds.

这很可能是最糟的状况了。

But this isn't the best of all possible worlds.

但这并不是所有可能的世界中最好的。

In the best of all possible worlds, we'd make our reconstruction from a wonderful, three-dimensionally preserved specimen.

诺雷尔：在所有可能的世界中最好的情况下，我们会根据一个美妙的、三维保存的标本进行重建。

'In the best of all possible worlds', yes, that's another one, speakers of French or English quote Candide, without even realising it.

“在所有可能的世界里” ，是的，这是另一个，讲法语或英语的人引用了 Candide， 甚至没有意识到这一点。

You don't want to miss another possible world breaking feat from this space agency, so lookout for China's Long March 5 rocket expected to launch at the end of July 2020, probably carrying the most ambitious Mars mission yet.

你不会想错过中国航天局的另一个可能打破世界纪录的壮举吧，那就关注一下中国的长征5号火箭吧，它预计将于2020年7月底发射，可能会搭载迄今为止最重大的火星任务。

Eventually, even Candide comes to realize this: to quote from the book, 'And sometimes Pangloss would say to Candide: 'All events form a chain in the best of all possible worlds.

最终，就连 Candide 也意识到了这一点：引用书中的话，“有时 Pangloss 会对 Candide 说：”在所有可能的世界中，所有事件都形成一条链条。

And for every possible choice and action that one could make but doesn't, another possible world; another possible self; another possible timeline unfolds in a separate direction that one can never know.

对于人们可能做出但并未做出的每一个选择和行动，另一个可能的世界、另一个可能的自我、另一条可能的时间线都会朝着人们永远无法知道的不同方向展开。

In any possible world, on the contrary, we feel that two and two would be four: this is not a mere fact, but a necessity to which everything actual and possible must conform.

相反，在任何可能的世界中，我们都觉得二加二等于四：这不仅仅是一个事实，而是一种必然性，所有现实的和可能的事物都必须符合这一必然性。