我不想辜负你对我的期望。
wǒ bùxiǎng gūfù nǐ duì wǒde qīwàng 。
I don't want to let you down in terms of your expectations of me.
他辜负了朋友的信任。
tā gūfù le péngyǒu de xìnrèn 。
He betrayed his friend's trust.
我们必须努力，绝不能辜负这个机会。
wǒmen bìxū nǔlì ， jué bùnéng gūfù zhègè jīhuì 。
We must work hard and absolutely cannot disappoint this opportunity.