Lecture with formulas on the blackboard in front of studentsLecture with formulas on the blackboard in front of students
A tropical waterfall with a spray cloud on the background of the skyA tropical waterfall with a spray cloud on the background of the sky
The room is dim. there is a lamp and a book on the tableThe room is dim. There is a lamp and a book on the table
The bright orange sun peeks through the spikelets on the fieldThe bright orange sun peeks through the spikelets on the field
Drawing of a man and a girl ready to fight on the great wall of chinaDrawing of a man and a girl ready to fight on the Great Wall of China