gruelling

The soldiers endured a gruelling ten-mile march through the dense jungle.

(Chinese) 士兵们忍受了穿越茂密丛林的十英里艰苦跋涉。

After a gruelling 12-hour shift at the hospital, the nurse was exhausted.

(Chinese) 在医院经历了长达12小时的劳累轮班后，护士精疲力竭。