Definition
used to express strong surprise or disbelief
（表示惊讶）真想不到！哎呀！
"I passed the exam, I'm so surprised!" "Well, I'll be a monkey's uncle!"
「我通过了考试，真是太惊讶了！」「哎呀，真想不到！」
"He actually quit his job to travel the world!" "I'll be a monkey's uncle, that's unbelievable!"
「他真的辞职去环游世界了！」「哎呀，这真让人难以置信！」
"They actually found ancient treasure on the beach." "I'll be a monkey's uncle! That's amazing!"
「他们真的在沙滩上发现了古代宝藏。」「哎呀，真想不到！这太棒了！」