高中英语句子帮忙分析哈我预习时的难点:1.Trade and curiosity have often formed t
高中英语句子帮忙分析哈 我预习时的难点: 1.Trade and curiosity have often formed the foundation for mankind's greatest endeavour. 2.The Arabic contacts to the African coast led to the next meeting between black people and a Chinese. 3.It was a major development that the Africans were reaching out to China. 1.我搞不懂formed the foundation for 是什么含义,FOR又是什么用法啊? 2.LED是一个定语从句吗?