Track ballast
01
軌道バラスト, 鉄道バラスト
the layer of crushed stones or gravel placed under and around railway tracks to keep them in place and provide drainage
例
The workers spread new track ballast along the railway line to make the tracks more stable.
作業員は線路をより安定させるために、線路に沿って新しい道床を敷いた。
Without track ballast, the train tracks would shift and become uneven over time.
軌道バラストがないと、線路は時間とともにずれて不均一になります。
