But when they succeed, as with the Stuxnet attack on Iran's Natanz uranium enrichment plant — an unacknowledged strategic effort by the United States and Israel to slow Iran's nuclear program — they can inflict great physical damage.
Too often Angelenos are ridiculed for overindulgence and unacknowledged for their efforts to better humankind.
The fates of these missing persons are unacknowledged and unsolved, meaning that efforts at more normal ties between Japan and North Korea are proceeding at a far slower pace than those between the two Koreas.
They are seen, they are known, and we believe that with focused assistance and the collective support of our shelter directors - whose own tireless efforts too often go unacknowledged - these families will achieve success and personal independence.
More than 400,000 Muslim soldiers from pre-Partition India fought alongside British troops during the conflict, but their vital contribution to the war effort has, many argue, gone largely unacknowledged.
For almost two years — between her father's efforts and the grace of an unseen and unacknowledged God — she did her work, and swam Sunday mornings at the crack of dawn, and got along all right.
For Jeffress, the heir to W.A. Criswell's pulpit, to champion an effort to silence Moore, reflects the powerful persistence of an unacknowledged past.
ESPN may prosper from the efforts of the unpaid players, but there is an unacknowledged academic harm to those students and others.
(On assignment recently in Lebanon, I reported on Hezbollah's unacknowledged activities inside Syria itself, where I outlined the group's efforts to prop up Assad's murderous regime).
Also, the effort made by the user that reports the error often goes unacknowledged, putting him in a discouraging position.
For those outside of the tech sphere, the behind-the-scenes efforts that make devices and software function often go unnoticed and unacknowledged – especially when they make requests for new features and fixes.
