1, optics.

The bright moon is thousands of miles away, shining brightly and still shadows are heavy. -Reflection of light.

Raise my cup, I invite the bright moon, which brings me its shadow and makes us three people. -Reflection of light.

The peaks reflect the floating mountain, but there is no mountain, no water and no ecstasy-the reflection of light.

The pool is clear and shallow, and the lotus knows the fish are scattered. -Refraction of light.

The vast desert is lonely, and the Yellow River sets the yen. -Refraction of light.

2. acoustics.

Teenagers leave home, old people return, and the local accent does not change. -The timbre of the sound.

Sleeping sickness in spring unconsciously broke the morning, and the chirping of birds disturbed my sleep. -The spread of sound.

The cries of apes on both sides of the strait are still unconsciously crowing in their ears, and the canoe has passed the heavy green hills. -The spread of sound.

In the lonely Hanshan Temple outside Suzhou, the bell that rang in the middle of the night reached the passenger ship. -Sound transmission, timbre.

The reverberation lasted for three days. -The echo of the sound.

With a long whistle, the mountains sounded everywhere and the valley answered. -The echo of the sound.

3. mechanics.

Leaves fall like the waves of a waterfall, and I can't see the Yangtze River rolling. -conversion of potential energy and kinetic energy of water.

The new leaves in Fanglin urge the old leaves, and the waves before the water are the waves after. -conversion of potential energy and kinetic energy of water.

4. heat.

The deep ice is three feet thick, and the snow is thousands of miles. -Curing.

The desert freezes over/kloc-0.000 feet, with a crack, and the sky is full of darkness and melancholy. -Curing.

Lost in the fog, the thunderstorm didn't stop. Liquefaction.

The white dew warms autumn, and the moon, the Ming and the Qing dynasties leak. Liquefaction.

The narrow path covered with vegetation, the night dew wet my clothes. Liquefaction.