black ribbon

基本解释

After the 7 July 2005 London bombings, Googledisplayed a black ribbon as a mark of respect and sympathy.
2005年7月7日，伦敦爆炸案发生，Google在网站图标中加入黑丝带表示尊重和哀悼；
Google alsodisplayed a black ribbon on their website to support the Hurricane Katrina relief effort in September 2005.
同样2005年9月美国卡特琳娜飓风来袭期间，Google也使用了黑丝带表示对救灾努力的支持。
In the Discworld novels by Terry Pratchett, the black ribbon is worn by vampires to show that they have sworn never to drink blood again.
在Terry Pratchett的小说《碟形世界》中，吸血鬼佩戴黑丝带表示永不喝血的决心。

She wore a straw hat secured under her chin with a black ribbon.
NPR: Excerpt: 'World Made By Hand'
And here in London we will be wearing that black ribbon and we will be running for the people out there.
NPR: Memories Of Safe Olympics Assure London Runners
With a black ribbon pinned to his chest, Kebede chased down Emmanuel Mutai in the closing stages, and overtook the tiring Kenyan to cross the line first in front of Buckingham Palace.
NPR: Kebede Wins London Marathon Amid Tight Security