1. Open-air exercise undoubtedly have lengthened the old man's life. 户外运动无疑延长了老人的寿命。
2. The hours of a wise man are lengthened by his ideas as those of a fool are by his passions. 聪明人的时辰得以延长在于他们的思想,而蠢人的时辰得以延长在于他们的激情。
3. This will require more effective use of the existing school day, a longer school day, or a lengthened school year. 这就要求更有效地使用学校时间,也需要更长每天在学校的时间或者延长学年的长度。