人在事在，事过境迁rén zài shì zài, shì ɡuò jìnɡ qiān

形容人活着的时候，事情还有解决的可能；事情已经过去，境况也就改变了。out of sight is out of mind

• civilization
• civilize
• claim
• clap
• clarify
• clarity
• class
• classic
• classical
• classification
• classify
• classless
• classmate
• classroom
• clay
• clean
• clean away
• cleaner
• cleaning
• cleanliness
• cleanly
• cleanup
• clean water
• clear
• clear about