It hurts to love someone and not be loved in return, but what is more painful is to love someone and never find the courage to let that person know how you feel. 爱一个人却得不到爱的回报是令人伤心的。更痛苦的是，爱上一个人却没有勇气让这人知道你的感受。 Maybe God wants us to meet a few wrong people before meeting the right one so that when we finally meet [...]

1. Never trouble trouble till trouble troubles you. 麻烦没来找你，就别去自找麻烦。 第一、四个trouble是动词，第二、三个trouble是名词。 2. I think that that that that that student wrote on the blackboard was wrong. 我认为那个学生写在黑板上的那个“that”是错误的。 第一个that是连词，引起宾语从句；第二、五个that是指示代词“那个”；第三个that在这儿相当于名词；第四个that是关系代词，引起定语从句。