题目
21. It is widely believed by educators that studying a second language can sharpen the mind and that this mental exercise contributes to better problem-solving abilities in daily life.
21. It is widely believed by educators that studying a second language can sharpen the mind and that this mental exercise contributes to better problem-solving abilities in daily life.
题目解答
答案
本句主干为“It is widely believed by educators that...”，表示“教育工作者普遍认为……”。后接两个并列“that”从句：
1. “studying a second language can sharpen the mind”可译为“学习第二语言可以使人思维更加敏锐”。
2. “this mental exercise contributes to better problem-solving abilities in daily life”可译为“这种脑力锻炼有助于在日常生活中提高解决问题的能力”。
综合来看，整句可译为：
教育工作者普遍认为，学习第二语言可以使人思维更加敏锐，而这种脑力锻炼有助于在日常生活中提高解决问题的能力。
（其他合理译法亦可接受，如“教育者普遍认为……”“使头脑更加灵活”等。）