In fact, when Twenge previously used this data to suggest a screen time effect, some commentators were quick to raise this problem.
2019年12月六級真題（第一套）閱讀 Section B
In their thirst for evidence on this issue, commentators seized on the recent report by the Census Bureau, which found that average household income rose by 5.2% in 2015.
2018年6月六級真題（第三套）閱讀 Section C
柯林斯高階英漢雙解學習詞典釋義
N-COUNT
解說員;實況播音員
A commentator is a broadcaster who gives a radio or television commentary on an event.