Even though the nuts, which need to stay moist, can be somewhat delicate to transport, traders carried them hundreds of miles throughout the forests and grasslands.
尽管这些需要保持湿润的坚果在运送途中可能会易碎,但商人们还是穿越森林和草原,把坚果运送到了数百英里之外。
Even today, the truth about those dark days remains a delicate subject.
即使是今天,那些黑暗日子的真相仍然是一个微妙的话题。
And the advances in synthetic biology required to transform those first delicate mirror cells into anything that could survive in the wild are even more remote.
合成生物学需要将这些起初纤弱无比的镜像细胞转变成能在自然环境中生存的某种生命,但这样的科学进步近乎遥遥无期。
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