楼梯的梯级用英语称为 "stair tread"。
来源：这个词源自中世纪拉丁文 "tradium"，意思是踩踏、践踏或跨越。它最终演变成英语中的 "tread"，意思是踩踏、践踏或跨越。
英文例句及中文翻译：
The stair treads were worn and spppery, so I had to be careful when I cpmbed the stairs.（楼梯的梯级磨损了，很滑，所以我爬楼梯时得小心。）
The stair treads on this staircase are made of wood, which gives them a warm, natural look.（这架楼梯的梯级是木制的，看起来温暖自然。）
The new stair treads have a non-spp surface, which makes the stairs safer to use.（新的楼梯梯级表面防滑，使楼梯更安全。）
来源：这个词源自中世纪拉丁文 "tradium"，意思是踩踏、践踏或跨越。它最终演变成英语中的 "tread"，意思是踩踏、践踏或跨越。
英文例句及中文翻译：
The stair treads were worn and spppery, so I had to be careful when I cpmbed the stairs.（楼梯的梯级磨损了，很滑，所以我爬楼梯时得小心。）
The stair treads on this staircase are made of wood, which gives them a warm, natural look.（这架楼梯的梯级是木制的，看起来温暖自然。）
The new stair treads have a non-spp surface, which makes the stairs safer to use.（新的楼梯梯级表面防滑，使楼梯更安全。）