The term obesity was coined in the middle of the 20th century as a concerted e
ffort by medical doctors “to say”: this is a medical issue, one over which w
e have authority and expertise.
第三行，括号是我加上去的，有大大可以提供这样用法的例句吗？

This reply is my attempt to say: don't sweat over grammatical details all the time, have fun imitating what you read/hear and you'll be fluent soon.