to stop being interested in something
对某事失去兴趣 (dui moushi shiqu xingqu)
"He quickly lost interest in the project."
"他很快就对这个项目失去了兴趣。" (ta hen kuai jiu dui zhege xiangmu shiqu le xingqu)
secretly or without public knowledge
to relax and stop being angry or nervous
to stop being angry and not remember someone’s mistake
to learn and grow from failure
to avoid laughing in a funny situation
to have a lot of tasks or responsibilities to deal with