这起案件留下的最大谜,是监控关闭前那十分钟到底发生了什么。Zhè qǐ ànjiàn liúxià de zuìdà mí, shì jiānkòng guānbì qián nà shí fēnzhōng dàodǐ fāshēng le shénme.The greatest mystery left by this case is what exactly happened in the ten minutes before the surveillance was switched off.
这个谜困扰了科学家几十年,至今没有答案。Zhège mí kùnrǎo le kēxuéjiā jǐ shí nián, zhìjīn méiyǒu dá'àn.This mystery has puzzled scientists for decades and still has no answer.
孩子出了一个谜,让全家人猜了半天。Háizi chū le yí ge mí, ràng quán jiā rén cāi le bàntiān.The child posed a riddle, and the whole family guessed for ages.