boys in blue, officers in blue, men in blue は警察官のこと。彼らの制服は青色。men in black と言う映画の主人公の制服は黒だった。
1:48 the boys in blue 警察官たち
Authorities Crack Down on Alleged Counterfeit Laundry Detergent
0:07 the men and women in blue 警察官と女性警察官。0;50 this line of blue 整列した警察官たち
1st day of kindergarten made less scary by the men and women in blue
0:07 his dad's brothers in blue 彼の父親の同僚警察官たち
18 of His Late Dad's Fellow Officers Surprise Teen at Party
4:18 the boys in blue, and a former boy in blue. 現職警察官と前職警察官のお歴々。
When The Killer Couldn't Have Done It | Monk
0:46 we are the men in black. 我々は地球防衛警察官『メン・イン・ブラック』だ。
Men in Black (1997) Official Trailer 1 - Will Smith Movie
参考リンク
http://bridge-english.blogspot.com/2017/04/dress-blues.html dress blues 軍服
