Definition
Used to indicate that you do not wish to explain something because the explanation would be lengthy.
說來話長（表示不想詳述）
"How do you know so many celebrities?" "Oh, it's a long story."
「你怎麼認識這麼多名人？」「哦，這說來話長。」
"Why did you suddenly quit that job?" "Well, it's a long story, I'll tell you later."
「你為什麼突然辭掉那份工作？」「嗯，說來話長，我晚點告訴你。」
"How did you end up moving here?" "It's a long story, it's actually quite complicated."
「你怎麼會搬到這裡？」「說來話長，其實挺複雜的。」