如何读取R中包含大量(可能是科学符号)的csv ?

I have some 13-digit numbers in a xls file and I use Excel to generate the csv file because I need to process it in R. Then when R read the csv file, it cannot recognize the big numbers. For example, 1329100082670 would appear like 1.329E+12 in R and lost its precision. I've tried to format the big numbers as text in Excel and then save it as csv but that didn't work!I have some 13-digit numbers in a xls file and