Perhaps, after millions of years of evolution, a kiss is not just a kiss?
或许，人类在经历了千万年的进化之后亲吻已经超越了吻的界限？
Should we not have matured beyond that after four billion years of slow evolution from simple-celled prokaryotes to homo sapiens?
我们经过了40亿年从简单的单细胞慢慢进化成高级的现代智能人类，难道我们仍然无法超越被物质摆布的漩涡？
They determined that after the gene arose, more than 300 million years ago, it barely changed in most branches of vertebrate evolution to the present day.
他们认定，FOXP2基因产生于三亿年前，此后直到今天，绝大多数脊椎动物身上的这个基因几乎没有改变过。
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