Lecture with formulas on the blackboard in front of studentsLecture with formulas on the blackboard in front of students
In the evening, the weather is cloudy on the field, the grasses and oats are soakedIn the evening, the weather is cloudy on the field, the grasses and oats are soaked
Summer field with flowers on the background of forests, mountains and cloudsSummer field with flowers on the background of forests, mountains and clouds
Golden field with wheat ears on the background of cloudsGolden field with wheat ears on the background of clouds