从天而降 From the sky
Explanation
形容事情的发生出乎意料，非常突然。
Describes something happening unexpectedly and very suddenly.
Origin Story
话说西汉时期，名将周亚夫奉命平定七国之乱。他采用奇袭战术，率军从隐蔽的小路直插叛军腹地，打得叛军措手不及。叛军听到军号声，以为是天兵天将从天而降，吓得丢盔弃甲，溃不成军。最终，周亚夫平定了叛乱，凯旋而归。这便是“从天而降”的由来，形容事情的发生出乎意料，非常突然。 后来，人们也用这个词语来形容某些幸运的机遇，比如意外的收获、突如其来的好消息等等。比如，一个苦苦寻觅多年却没有找到的失物，突然间出现在你眼前，这也可以说是从天而降的惊喜。又比如，你一直期盼的职位，突然有机会让你竞争，这也是从天而降的好机会。总之，这个成语用来形容任何突然而至，令人意想不到的事情。
During the Western Han Dynasty, the famous general Zhou Yafu was ordered to quell the rebellion of seven states. He adopted a surprise attack tactic, leading his troops from a hidden path straight into the heart of the rebel army, catching them completely off guard. When the rebels heard the bugle calls, they thought that heavenly troops had descended from the heavens, and they were so frightened that they abandoned their weapons and armor and fled in disarray. In the end, Zhou Yafu quelled the rebellion and returned triumphantly. This is the origin of "coming down from the heavens", which describes something happening unexpectedly and very suddenly. Later, people also used this idiom to describe certain lucky opportunities, such as unexpected gains, sudden good news, etc. For example, a lost item that one has been searching for for many years and has not found suddenly appears before you. This can also be described as a surprise from heaven. Another example is that the position you have been hoping for suddenly gives you the opportunity to compete. This is also a good opportunity that comes from heaven. In short, this idiom is used to describe anything that suddenly comes, unexpectedly.
Usage
常用于形容事情突然发生，出乎意料。
Often used to describe something happening suddenly and unexpectedly.
Examples
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胜利来得如此突然，简直是 从天而降！
shengli lai de ruci tudiran, jianzhi shi cong tian er jiang
The victory came so suddenly, it was simply a gift from heaven!
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他获得大奖，真是从天而降的好运气！
ta huode dajiang, zhen shi cong tian er jiang de hao yunqi
He won the grand prize, it was a stroke of luck!