Most nations will decide it is needed only if we have really bad luck as warming unfolds and if we fail miserably in controlling emissions.

多数国家只有在我们的运气确实糟糕、升温开始展现以及我们在控制排放方面一败涂地时，才会判定地球工程是必需的。

youdao

Charlotte will be infected with worry little sister Anne, is such a thing as luck would have it.

夏洛蒂担心小妹妹安妮也会染上，不巧事情正是这样。

youdao

The road map says that an optimal path would require a larger cut by 2020 but that, as luck would have it, the optimal reduction, set at 25%, is what will be realised by existing plans for more renewable energy and improved energy efficiency if they work out.

ECONOMIST: Europe's climate policy

As luck would have it, a project called NOvA, which should start collecting data in the spring of 2013, will send neutrinos through the Earth's crust from Batavia to an underground detector 810km away in Minnesota.

ECONOMIST: The future of physics (1)