to maintain contact or communication with someone over time
与某人保持联系或沟通 (yǔ mǒu rén bǎochí liánxì huò gōutōng)
"Even after graduation, they promised to keep in touch with each other."
"即使毕业后，他们承诺要与彼此保持联系。" (jíshǐ bìyè hòu, tāmen chéngnuò yào yǔ bǐcǐ bǎochí liánxì)
to resolve confusion or disagreement with someone
to gradually change form or nature
to become extinct or disappear completely
to exit from a website or app after finishing your work
to encourage someone to continue with confidence or hope
to reduce something such as pollution or temperature
