The process of tuning a detector involves looking at the false alarms and refining the bug pattern so as to eliminate some false alarms without excluding too many actual bugs.

优化检测器的过程包括查找假警报和细化bug模式，以消除某些假警报，同时不要将太多的真实bug排除在外。

youdao

No one is sure exactly how infants' immune systems learn to distinguish good bugs from bad, but killing off too many gut bacteria even, apparently, ones that cause illness does appear to disrupt the process.

ECONOMIST: Asthma