He used a couple of bolsters to elevate his head.

他用兩個墊枕墊頭.

《簡明英漢詞典》

The double - row piles with both inclined and horizontal bolsters also analyzed in consideration of staged excavation.

本文亦分析了考慮開挖過程的安置斜撐與帶支撐的雙排樁支護結構.

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