在本系列，当我尝试着通过“物件”来讲叙一段世界历史时，这块来自非洲、来自现代坦桑尼亚所在地、带着劈痕的石头，便是一切的起点。
In this history of the world that I'm trying to tell through 'things', this chipped stone from Africa - from modern Tanzania - is where it all begins.
用腹接取代劈接和切接作为果树高接更新品种的方法对于克服缺铁失绿症、促进更新品种生长具有重要意义。
It is important to replace cleft grafting and cutting grafting with belly grafting as a method of top working to correct chlorosis and improve growth of new cultivar.
在抗风能力的比较中，劈接抗风力最强，切接抗风力较弱。
The wind-resisting ability of split-grafting was the most powerful, but cut-grafting was weaker.
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