a period of difficulty or trouble
一段困难或麻烦的时期 (yi duan kunnan huo mafan de shiqi)
"Their marriage went through a rough patch last year."
"他们的婚姻去年经历了一段困难时期。" (tamen de hunyin qunian jingli le yi duan kunnan shiqi)
to remove tension or misunderstanding by talking openly
having naive or unrealistic dreams or hopes
to feel mentally or emotionally unstable
extremely tired and almost falling asleep
to do something revolutionary or extremely difficult
to hide the most important part of the story