Ключевые слова: activity, backdrop, backhoe, blue, clouds, colors, construction, cooperation, daytime, digging, dusk, earth, effort, engineering, environment, evening, excavation, field, ground, hard, horizon, industry, laboratory, laborers, landscape, light, manual, mountain, natural, nature, outdoor, project, rugged, scene, scenery, shadows, shifts, silhouettes, skill, skirt, sky, soil, sunset, teamwork, terrain, tools, trench, work, workers,