undetected

基本解释

This very simple scheme reduces the risk of undetected accidental failure to about 1 in 256.
這項簡單模式將未被發現的意外故障的風險降低到約 1/256 。
In addition, using an aspect to implement FFDC ensures that no errors or exceptions go undetected, which can easily happen when it is implemented by hand.
除此之外，使用一個方麪實現FFDC可以確保沒有錯誤或者異常未被發現，如果手動診斷的話這個問題常常發生。
But viruses know their hosts well—they can break into cells undetected, switch off alarm systems, and undermine the cell's authority in deciding which genes get expressed.
但是，病毒知道他們的宿主---它們可以不被發現的侵入細胞，關掉警報系統，削弱細胞決定自身基因表達的權威。

"This capability allows the Strike Eagle to fly undetected, deep into enemy territory and deliver its ordinance."
"In 2008,the Greek Coast Guard reported the arrival of 2,648 unaccompanied children, but many more are believed to have entered the country undetected.

That is only natural after years in which anomalies have been left undetected or even concealed.
ECONOMIST: Chinese business
Subtle, undetected slippages in trust--not just big, one-off gaffes--can do plenty of damage, too.
FORBES: Do Your Customers Trust You?

If you are undetected or if you do something undetected, people do not find out where you are or what you are doing.