Their heat tolerance is reduced, too.

她们也降低了。

They are now centering on those healthy survivors and hoping to further increase their resistance to heat.

他们现在那些健康幸存者为中心，希望进一步提高它们。

There wasn't nearly enough time for the microbes here to evolve a heat tolerance, so what's going on?

这里微生物几乎没有足够时间进化出，所这怎么回事？

They've also evolved greater heat toleranceto deal with the high temperatures that define dense urban environments, what we call urban heat islands.

它们还进化出了更强， 对密集城市环境高温，即我们所说城市岛。

They say if the more heat-resistant corals they developed do well in the ocean, the method can be used to help save suffering and dying reefs.

他们说，如果他们培育更强珊瑚在海洋中表现良好，这种方法可用来帮助拯救遭受痛苦和濒临死亡珊瑚礁。

But it came with a set of its own challenges like fuel efficiency, supersonic shockwaves that interfered with the plane's airflow, and, most important of all, heat resistance.

但它也面临着一系列挑战，例如燃油效率、干扰飞机气流超音速冲击波，及最重要。