railway crosstie 铁路枕木
concrete crosstie 混凝土枕木
wooden crosstie 木质枕木
A: Do we need more wood for the railway maintenance?
A：铁路维护需要更多木材吗？
B: Yes, we need at least fifty new crossties.
B：是的，我们至少需要五十个新枕木。
1) 铁路枕木
2) 交叉连接件
3) 横梁
1. 铁路枕木
2. 交叉连接物
noun
1. A piece of timber or concrete that supports railroad tracks.
Synonym: sleeper