形容词
1. He made strenuous efforts to improve his reading.
他奋发努力提高阅读能力。
2. It takes many years of strenuous training to be an outstanding athlete.
要成为一名杰出的运动员需要多年艰苦的训练。
3. She is a strenuous supporter of women's rights.
她是妇女权利的积极支持者。
4. Is swimming a strenuous exercise?
游泳是很费力的运动吗？