Dr.Pappas with the NGO Interaction says he sees no reason why African countries should take drastic preventive action at this stage.

VOA: standard.2009.04.28

However that may be, no question about it, there was contact, interaction,and influence.

不论怎样,毫无疑问,这些文明相互交流,相互作用,相互影响

耶鲁公开课 - 古希腊历史简介课程节选