只有通过保护环境，我们才能向子孙后代承诺给他们一个美丽的地球。
Only by protecting the environment can we assure our later generation of a beautiful planet.
这就给他们的后代注入了新的基因。
That would give their offspring an injection of fresh genes.
类似地，沙马希望年轻一代能“传承关于我们引发争论的自由的记忆”给他们的后代。
Similarly, Schama wants younger generations to 'pass on the memory of our disputatious liberty' to their descendants.
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