统计偏差 meaning in English

statistical discrepancy

Unfortunately , we have to get the address exactly right , down to the byte , or the program will crash . coming up with the right address using the trial and error approach may take a while . to make things easier , we can insert lots of null operations in front of the shell code
但是，问题的大部分是因为数据很可能有统计偏差，因此大量精力花在了使用七个密码散列和一个相当慢（但非常好）的伪随机数发生器来消除此类问题上。