Blue river at the foot of green mountains, green trees on the right bank against the sky in white cloudsBlue river at the foot of green mountains, green trees on the right bank against the sky in white clouds
A field of pink cosmos on the background of mountains and cloudsA field of pink cosmos on the background of mountains and clouds
The rays of the sun fall on the leaves of the treesThe rays of the sun fall on the leaves of the trees
Lecture with formulas on the blackboard in front of studentsLecture with formulas on the blackboard in front of students