If the samples are statistically representative, that should, so goes the theory, give a credible picture of what the entire population would think, were it as well-informed.
如果样本人群具有统计学上的代表性，那么根据理论这种方式将会表达人群的真实想法。
2
That means, in theory, 15 percent of the American population is predisposed to live to be 100.
这在理论上意味着15%的美国人有活到100岁的倾向。
3
This study is the first one to apply metapopulation theory in natural butterfly population in China.