What does second time around mean?

The physical principle that broken mirrors cannot be reassembled is as follows:

First, second time around can't explain scientifically.

From the physical point of view, it is explained that the broken mirror can not reunite because the mirror is composed of molecules, and there is attraction and repulsion between the molecules. It is the existence of molecular gravity that keeps solids in a certain shape.

The mirror is broken and the cracks are uneven, so it is difficult to combine closely. However, the range of molecular gravity is very small. Beyond this range, the gravity is very small. Mirrors can't reunite accurately because two mirrors can't get close to the range of molecular gravity. So second time around can't.

Second, broken mirrors cannot reunite meaning and extension.

The story of Rebirth takes place in the Southern Dynasties, when Princess Lechang of the State of Chen reunited with her husband Xu Deyan after separation. Later, the second time extended to the reunion and reconciliation after the separation or breakup of husband and wife.

Third, sports knowledge in other folk customs.

1, the small scale weighs one thousand kilos.

According to the principle of lever balance, if the power arm is a fraction of the resistance arm, then the power is several times the resistance. If the weight of the arm is very large, it is entirely possible to "dial one or two kilograms."

2, people are United, Taishan is the top.

If the directions of the components are the same, the resultant force is equal to the sum of the components.

Real gold is not afraid of fire, and truth is not afraid of argument.

Judging from the melting point of gold, although it is not the highest, it is 1068℃, while the temperature of general flame is about 800℃. Because the temperature of the flame is lower than the melting point of gold, gold cannot be melted.

4, the moon is dizzy and the wind is rising, and the foundation is moist and rainy.

When the strong wind comes, the temperature in the high air drops rapidly, and the water vapor condenses into small water droplets, which is equivalent to many prisms. Moonlight is scattered through these prisms to form a colorful halo, so it is called "the moon is dizzy but the wind".

5, whistle, the valley should be.

People shout in the mountains, and the sound can be reflected many times to form a loud echo, which will last for a long time, as if the mountains are shouting and the valleys are echoing.

6. But I heard his voice, but I didn't see him.

In the process of wave propagation, when the size of the obstacle is smaller than the wavelength, obvious diffraction can occur. Generally, the height of the fence is several meters, and the wavelength of sound wave is larger than the height of the fence, so you can enclose the high wall for people outside the wall to hear; The wave length of light is much smaller than the size of a high wall, so the light emitted by people can't be diffracted outside the wall, and people outside the wall can't see people inside the wall.