工人从现存的最古老最高的树上剪下树枝，以获得自然的终极幸存者的无垢的遗传样品。
The workers clipped boughs from some of the preserve's oldest and tallest trees to get genetically pure samples of some of nature's ultimate survivors.
工人从现存的最古老最高的树上剪下树枝，以获得自然的终极幸存者的无垢的遗传样品。
The workers clipped boughs from some of the preserve's oldest and tallest trees to get genetically pure samples of some of nature's ultimate survivors.
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