railway track structure的用法和樣例：
例句
- Owing to the differences in its rail structure, the change of track geometry is different.
由于其軌道結構的差異，相應的軌道幾何狀態(tài)變化是不一樣的。 - So the conventional ballasted track must be intensified for high speed and heavy haul railway line, this is a chance for the elastic sle.
在高速和重載的條件下傳統的有碴軌道結構型式面臨著(zhù)嚴峻地考驗。
