shoulder strap

shoulder-strap的词性：
n.（名词）

1. A strap, usually one of a pair, supporting a garment from the shoulder.
背带：通常指从肩部支撑衣服的一对带子中的一根

2. A strap worn across the shoulder to support an item, such as a bag.
背带：从肩头跨过的支持一物体的带子，如书包