核心差别
strenuous 强调strenuous 是一个形容词，arduous 则侧重形容某事需要付出巨大努力、非常困难或充满挑战
使用场景对比
| 对比方面 | strenuous | arduous |
|---|---|---|
| 核心含义 | strenuous 是一个形容词，指需要付出巨大努力或体力的，常用于描述活动、工作或任务非常费劲或艰苦。 | 形容某事需要付出巨大努力、非常困难或充满挑战，常用于描述任务、旅程或过程。 |
| 词性 | 形容词 | 形容词 |
| 使用语域 | strenuous 通常用作定语形容词，修饰名词如 activity、exercise、effort 等，表示这些事物需要大量体力或精力。 | 通常用作定语修饰名词，如 arduous task/journey/process，或作表语与系动词连用，如 The climb was arduous. |
对比例句
After a strenuous hike, we were all exhausted and needed a long rest.
经过一次费劲的徒步后，我们都筋疲力尽，需要长时间休息。
She avoids strenuous exercise because of her recent injury.
由于最近的受伤，她避免进行费劲的锻炼。
The hike up the mountain was arduous, but the view from the top was worth it.
爬山很费力，但山顶的景色值得这一切。
Learning a new language can be an arduous process, especially for adults.
学习一门新语言可能是个费力的过程，尤其对成年人来说。
常见误用提醒
使用 strenuous：He made a strenuous try to finish the project. → He made a strenuous effort to finish the project. (strenuous 通常修饰 effort、activity 等名词，而不是 try；try 作为名词时较少与 strenuous 搭配，应改为 effort 以更符合英语习惯。)
使用 strenuous：This work is very strenuous for me to do. → This work is very strenuous for me. (strenuous 本身已表示费劲或艰苦，加上 to do 显得冗余；直接说 strenuous for me 更简洁自然。)
使用 arduous：The work is arduously. → The work is arduous. (arduous 是形容词，直接作表语，不需要加 -ly 变成副词。正确用法是 The work is arduous，表示工作很费力。)