This is roughly equivalent to the human age range of six to nine, Dr. Kahlenberg said.
这大致等同于人类六岁到九岁之间的年龄范围。” 卡伦博格博士如是说。
2
In human children, societal stereotypes may dictate what boys and girls play with, said Sonya Kahlenberg, a biologist at Bates College in Maine and one of the study’s authors.
在人类的孩童世界里，社会的固定模式要求男孩子和女孩子应该玩什么玩具。
3
Wrangham and Kahlenberg agree that "biological predilection" appears to be involved in both toy selection and forms of play among human and non-human primate males and females.