The preference is so entrenched that by age five youngsters prefer playmates who not only speak the same language but do so with the same accent.

• 这种偏见是根深蒂固的,以致于在五岁的时候,小孩们挑选玩伴就借此为标准,不仅要求说同一种语言,甚至口音都得一样。