虽然许多调查所用的随机取样不能覆盖大部分人口但是这一过程使人们能更深刻地理解选举和消费的模式
Although the random sampling used in many surveys cannot cover the majority of the population, this process enables people to have a deeper understanding of the patterns of elections and consumption
以上为机器翻译结果，长、整句建议使用 人工翻译 。