adj.费力的，繁重的，艰苦的，劲头十足的，奋力的，顽强的

Travel on a budget is strenuous.
穷游是艰苦的。
We should avoid strenuous exercise in the evening.
我们应避免在傍晚进行剧烈的运动。
Let's make concerted and strenuous efforts to build a better future.
让我们齐心协力构建美好未来。
The mountain climb was a strenuous activity, testing both our physical endurance and mental resilience.
爬山是一项艰巨的活动，考验着我们的体力和精神韧性。
After a day of strenuous exercise, I felt completely exhausted but also incredibly invigorated.
经过一天的剧烈运动后，我感到筋疲力尽，但同时也异常振奋。
She took up jogging to improve her fitness, but found the initial sessions quite strenuous.
她开始慢跑以提高健康水平，但发现最初的几次相当费力。
The new job requires a great deal of strenuous work, often involving heavy lifting and long hours.
这份新工作需要大量的体力劳动，常常涉及重物搬运和长时间工作。
The soldiers underwent strenuous training to prepare them for combat situations.
士兵们进行了严格的训练，为战斗情况做准备。
The recovery process after surgery can be quite strenuous, both physically and emotionally.
手术后的恢复过程可能在身体和情感上都非常艰难。
The athlete pushed himself to the limit during the strenuous marathon, determined to break his personal record.
这位运动员在艰苦的马拉松比赛中挑战了自己的极限，决心打破个人纪录。
The renovation project was a strenuous task, requiring weeks of hard labor and attention to detail.
装修项目是一项艰巨的任务，需要几周的努力劳动和对细节的关注。
The strenuous hike through the dense forest left us with a newfound appreciation for nature's beauty.
穿越茂密森林的艰苦徒步旅行使我们对大自然的美丽有了新的认识。
Despite the strenuous efforts of firefighters, the blaze continued to spread rapidly through the building.
尽管消防员们付出了巨大的努力，火势仍然迅速蔓延到整个建筑。