I can't understand the technical terms in our photography class. Who can help me answer them in words I can understand?

The forward direction is front light, three-quarters of the forward direction is front light, and the bilateral forward direction is basically average light. Rembrandt light is also called triangle light.

The first picture you give will take seven or eight pictures.

The second picture, a high-profile and low-key photo, you should understand. Take another one with vision and one without vision. This is easy to understand. So are the headlights. Simulating a real light source is simulating sunlight, that is, a luminous object that cannot have two main lights and six exposure levels. You can increase and decrease the exposure of items such as light bulbs in turn.

You should understand the topic, right? If you have any questions, you can ask.