The statement 'Rien n'effacait notre histoire' means Nothing erases our affair. In the word-by-word translation, the noun 'rien' plus the adverb 'ne'* means 'nothing'. The verb 'effacait' means...
The mean distance is the same as the mean of a set of numbers,but this time, instead of them just being numbers, they're lengths. You just simply add up all the numbers and divide the total length,...