一经发现
Once discovered
以上为机器翻译结果，长、整句建议使用 人工翻译 。
在校内抽烟一经发现将被记过失分三分。
You'll get three demerits if you're caught smoking on school grounds.
《牛津词典》
错误一经发现，就应立即纠正。
Mistakes should be corrected as soon as detected.
《新英汉大辞典》
士兵若违背此令杀死战俘，一经发现必受严惩。
Soldiers who are caught disobeying this order by killing prisoners will be punished severely.
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