漂白

例句：

1. 1. The clothes were so dirtythat they needed to be bleached beforewearing them again.
   这些衣服太脏了，需要再次穿之前先漂白。
2. 2. Thepainter used a special chemical to bleach theold wooden floor.
   画家使用一种特殊的化学品来漂白旧木地板。
3. 3. The teacher asked thestudents to help him with the task ofbleaching the walls in the classroom.
   老师要求学生们帮助他完成教室墙壁的漂白工作。