guardrail

汉语翻译

n. 护栏, 护轨

英语解释：

名词 guardrail:

1. a railing placed alongside a stairway or road for safety
   同义词：safety rail

详细解释：

guard.rail

n.（名词）
A protective railing, as on a staircase or along a highway.
护栏：楼梯或公路上的保护性栏杆