她是从一只成年母羊的单个细胞中克隆出来的，这推翻了长期以来一直坚持的科学教条，该教条宣称这样的事情在生物学上是不可能（发生）的。
She was cloned from a single cell of an adult female sheep, overturning long-held scientific dogma that had declared such a thing biologically impossible.
我不想做任何会使自己做出长期承诺的事情。
I don't want to do anything that will involve me in a long-term commitment.
长期以来，金星一直被认为是一个警示故事，告诉我们在像地球这样的行星上，任何事情都可能出错。
Venus has long been held up as a cautionary tale for everything that could go wrong on a planet like earth.
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