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observe unobtrusively (Boulder, Colorado's Open Space and Mountain Parks (OSMP) wanted to observe the land system's sensitive wildlife habitats unobtrusively, so park rangers placed nine camera traps across 46,000 acres to see how animals used the area. people.com ART Vancouver) |
незаметно наблюдать: 1 phrase in 1 subject |
Informal | 1 |