https://online2.tingclass.net/lesson/shi0529/0007/7791/1101101508_586.mp3
https://image.tingclass.net/statics/js/2012
Sorry to have let you down. 對不起,讓你失望了!
To make sb. disappointed
Our parents work hard to support us so as to make us a knowledgeable person! We should not let them down!
父母為了讓我們成為有用之才努力工作支持我們,我們不要讓他們失望!