they had a definite meaning,for they were as near as early m

因为这里的get to 是到达的意思
get to writing指的是 到达书写
as near as 跟...一样近
as...as 中间用形容词或副词的原级
as near as early man could get to writing
是指跟早期的人类到达书写（这种程度）一样近
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