1 . Human fingerprints are u________, making them suitable as long-term markers of human identity(身份).

2 . You can then spend three days exploring the rainforest with a local guide and enjoying the plants and animals unique to the rainforest.
翻译：在接下来的三天里，您可以在当地导游的陪同下，深入雨林进行探索，欣赏雨林特有的动植物。
仿写：没有人确切地知道为什么青春期（ adolescence）是人类独有的。
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3 . Human fingerprints are u__________, making them suitable as long-term markers of human identity (身份).