to develop resistance to a disease
发展对疾病的抵抗力 (fāzhǎn duì jíbìng de dǐkànglì)
"Vaccines help your body build immunity to dangerous viruses."
"疫苗帮助您的身体发展对危险病毒的抵抗力。" (yìmiáo bāngzhù nín de shēntǐ fāzhǎn duì wēixiǎn de bìngdú de dǐkànglì)
to make sure someone is safe or doing well
to reduce the amount of something you use or do
to arrange a meeting or appointment
to start or improve honest and clear communication
to fail to meet a goal or expectation
to start sleeping, especially unintentionally