志愿 (zhì yuàn): aspiration; ambition; to volunteer

My aspiration is to become a doctor when I grow up and help sick people recover their health.

When he was young, he volunteered to teach in the western region, bringing knowledge to the children there.

When filling out her university application, she wrote Peking University's Chinese Department as her first choice.

The volunteers use their weekend time to go to the community service center and provide free haircuts for the elderly.

After years of hard work, he finally realized his aspiration and became an excellent rural teacher.