Weeks, much pleased at the turn of affairs, became very affable, but confined his remarks chiefly to the weather, while Holcroft, who had an uneasy sense of being overreached in some undetected way, was abstracted and laconic. He was soon on the road home, however, with Mrs. Mumpson and Jane. Cousin Lemuel's last whispered charge was, "Now, for mercy's sake, do keep your tongue still and your hands busy."英文原著 · 《He Fell In Love With His Wife》
There is some courtship in the night time; either in the early part of the evening, on the outskirts of dances and other public affairs, or after every- body is supposed to be asleep. This is the secret courtship. The youth may pull up the tentpins just back of his sweetheart and speak with her during the night. He must be a smart young man to do that undetected, for the grandmother, her chaperon, is usually "all ears."英文原著 · 《Indian Boyhood》
The ape-man, leading his little band, moved stealthily through the winding alleys of A-lur, arriving undetected at the building which hid the entrance to the secret passageway. This spot being best protected by the fact that its existence was unknown to others than the priests, was unguarded. To facilitate the passage of his little company through the narrow winding, uneven tunnel, Tarzan lighted a torch which had been brought for the purpose and preceding his warriors led the way toward the temple.英文原著 · 《Tarzan the Terrible》
"Excellent!" the Duke declared. "It would have been a perfect disgrace to our police system to have left two such crimes undetected. Our respected friend at the Home Office will have a little peace now."英文原著 · 《The Illustrious Prince》
It's usually not serious, but in the case of Maggie, it became quite serious because the problem went undetected for so long.美剧 · 《The Good Wife》