为了研究小山羊的叫声，研究人员分别在山羊一周大和五周大的时候记录了他们的叫声。 。
In order to test the goats' vocal repertoire they recorded calls at one-week-old and again when they were aged five weeks.
树荫遮蔽下，一只珍珠鸟被圈了起来，两头母牛在Sawadogo的脚边打瞌睡。 在这个寂静的傍晚，我们只能听到几只山羊咩咩的叫声。
Two cows dozed at his feet; bleats of goats floated through the still late-afternoon air.
我们发现，基因相近的山羊发出的叫声很相似。 同时，生活在同一社会群体中的山羊发出的叫声也彼此类似。而且，随着山羊的年龄增长，生活在相同生活环境下的山羊，其叫声就越相似。
We found that genetically-related kids produced similar calls… but the calls of kids raised in the same social groups were also similar to each other, and became more similar as the kids grew older.
我们发现，基因相近的山羊发出的叫声很相似。 同时，生活在同一社会群体中的山羊发出的叫声也彼此类似。而且，随着山羊的年龄增长，生活在相同生活环境下的山羊，其叫声就越相似。
We found that genetically-related kids produced similar calls… but the calls of kids raised in the same social groups were also similar to each other, and became more similar as the kids grew older.
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