突变

这起罕见的基因突变临床病例属于医学上的极端个案，对罕见病研究具有特殊的参考价值。

zhè qǐ hǎn jiàn de jī yīn tū biàn lín chuáng bìng lì shǔ yú yī xué shàng de jí duān gè àn, duì hǎn jiàn bìng yán jiū jù yǒu tè shū de cān kǎo jià zhí.

This rare clinical case of gene mutation is an extreme medical case and has special reference value for rare disease research.

原本清晨出门时还是一片万里无云的大晴天，哪知道午后天色突变，电闪雷鸣间降下了倾盆特大暴雨。

yuán běn qīng chén chū mén shí hái shì yī piàn wàn lǐ wú yún de dà qíng tiān, nǎ zhī dào wǔ hòu tiān sè tū biàn, diàn shǎn léi míng jiān jiàng xià le qīng pén tè dà bào yǔ.

It was originally a cloudless sunny day when I went out in the early morning, but the sky suddenly changed in the afternoon, and there was a heavy downpour amidst lightning and thunder.