guardrail

guardrail汉语翻译：
n. 护栏, 护轨英语解释：
名词 guardrail:

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