trestle cap

例句：

1. 1. She wore a trestle cap to protect her hair from the sun.
   她戴着一个扶梯帽，以防头发被太阳晒伤。
2. 2. The construction workers used trestle caps to keep their heads warm during the cold weather.
   建筑工人使用扶梯帽在寒冷的天气里保持头部温暖。
3. 3. The trestle cap was designed to provide shade and protection for people on the moving train.
   这个扶梯帽是为了给火车上的乘客提供遮阳和保护而设计的。