哀悼者佩戴黑色臂章表达对逝者的敬意。

The mourners wore black ___armbands to show respect for the deceased.

初学者游泳时通常会戴上充气臂圈来帮助浮在水面上。

Beginners usually wear ___armbands while swimming to help them stay afloat.

他在打篮球时戴了一个运动臂带防止袖子滑落。

He wore a sports ___armband to keep his sleeves from sliding during basketball.