名詞 bleacher:

1. a worker who bleaches (cloth or flour etc.)

bleach.er

n.（名詞）
One that bleaches or is used in bleaching.
漂白工人或漂白劑
Often bleachers An often unroofed outdoor grandstand for seating spectators.
常作 bleachers 露天看臺：一種常為無頂?shù)穆短煊^眾大看臺

來源：
[Sense 2, from comparing a person`s exposure to the sun when sitting on them with the exposure of linens bleaching on a clothesline]
[釋義二，由坐在大看臺而暴露在太陽下比作曬衣繩上被曬白的亞麻布而來]