转瞬之间 In the blink of an eye
Explanation
形容时间非常短暂，一瞬间就过去了。
Describes a very short period of time, passing in an instant.
Origin Story
夕阳西下，余晖洒满大地。一位名叫小雨的女孩坐在山坡上，望着远方渐渐暗淡的天空。她手中握着一封信，那是她远方哥哥寄来的。信中写满了哥哥的思念，以及对家乡的牵挂。小雨看着信，心中百感交集。哥哥离开家已经五年了，五年时光，转瞬之间就过去了，如同白驹过隙。她还记得哥哥临行前，依依不舍地抱着她，在她耳边轻声嘱咐，要她好好照顾自己，好好读书。如今，哥哥在信中提到，他即将回乡，小雨的心中充满了喜悦，眼泪也情不自禁地流了下来。她多么渴望哥哥能够早日回家，再次感受家人的温暖与爱。她相信，转瞬之间，哥哥就会回到她的身边。
As the sun set, the afterglow bathed the earth in golden light. A girl named Xiaoyu sat on a hillside, gazing at the distant sky as it gradually dimmed. In her hand, she held a letter from her brother, who lived far away. The letter was filled with his longing and concern for his hometown. Xiaoyu read the letter, her heart filled with mixed emotions. Her brother had been gone for five years—five years that had passed in the blink of an eye, as fleeting as a galloping horse. She still remembered his reluctance as he left, holding her tightly and whispering words of encouragement in her ear, telling her to take care of herself and study hard. Now, her brother's letter mentioned that he would soon be returning home, filling Xiaoyu's heart with joy and tears. She longed for the day he would come back, for the warmth and love of her family. She believed that he would return to her side in the blink of an eye.
Usage
用来形容时间短暂，转眼即逝。
Used to describe the shortness of time, passing in an instant.
Examples
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转瞬之间，他就完成了任务。
zhuǎn shùn zhī jiān, tā jiù wánchéng le rènwu.
In the blink of an eye, he completed the task.
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他消失得无影无踪，转瞬之间就离开了。
tā xiāoshī de wú yǐng wú zōng, zhuǎn shùn zhī jiān jiù líkāi le。
He disappeared without a trace, leaving in a flash of an eye.