strenuous vibration

例句：

1. 1. The hike was strenuous, and I felt exhausted by the end of it.
   这次徒步旅行很费力，我走到最后时感到筋疲力尽。
2. 2.The research was strenuous, but she persevered through the difficult work.
   这项研究很费力，但她坚持完成了这项工作。
3. 3. The construction project was a strenuous task, requiring constant attention to detail.
   这个建筑项目是一个费力的任务，需要不断关注细节。