这些动物没有复杂的大脑来识别人类面部特征之间的细微差别。
For example, Pithecanthropus erectus is depicted in an Indonesian museum with Malay facial features, because this corresponds to public perceptions.例如，在印度尼西亚的一个博物馆里，直立猿人被描绘成具有马来人的面部特征，因为这符合公众的认知。
We'd assumed we'd have to give it a moving head and tail, facial features, and put a scene on it to make it smell like a real rat, but that wasn't necessary.我们认为我们必须给它一个移动的头和尾巴，面部特征，并给它一个场景，使它闻起来像一只真正的老鼠，但这是不必要的。
