My own research at the Stanford Center on Adolescence uses in-depth interviews with small samples of youngsters rather than large-scale surveys.
我个人在斯坦福青少年研究中心的研究采用的是对小样本的青少年进行深入访谈的方式，而不是大规模的调查。
2
A survey by Hangzhou Center for Disease Control and Prevention shows that the scale of youth smoking is increasing and the age of people who smoke tends to be lower.
杭州市疾控中心调查发现，青少年吸烟比例逐渐加大，吸烟人群呈现低龄化的趋势。
3
Assuming the bubbles emanate from our Galaxy's center, the scale of the bubbles is huge, rivaling the entire Galaxy in size, and spanning about 50, 000 light years from top to bottom.