They were sophisticated tool makers with high social and cognitive skills.
他们具有高度的社交及认知能力，制造工具非常有经验。
He says the report can serve as a planning tool for policy makers.
他表示，这份报告可以作为决策者的规划工具。
The evolution of the thumb allowed human beings to become tool-makers.
拇指的进化使人类成为工具制造者。
The evolution of the thumb allowed human beings to become tool-makers.
拇指的进化使人类成为工具制造者。
应用推荐