英语翻译
文章主要是讲social media data的优缺点当其用在科学研究中的时候.
在优点部分里主要是说social media data 数量很多而且容易搜集,这里有句话不懂什么意思：
Ease of collection means that researchers can often get data on entire populations.An entire population of Tweets or email-messages can be collected with no sampling required.There are no issues of biased respodent selection or assembling a sampling frame.