Represents angle, coefficient, angular acceleration, first, ionization degree, conversion rate.

"β" is pronounced /'bi:t? /or/'Really? t？ /? Chinese name: Beta

Represents the magnetic flux coefficient, angle and coefficient.

"δ" is pronounced /'delt? /? Chinese name: Delta

Represents change, enthalpy change, entropy change, diopter, discriminant in quadratic equation, chemical shift.

"ε" is pronounced /'eps? l？ n/？ Chinese name: Epsilon

Represents the radix, dielectric constant and dielectric constant of logarithm.

ζ pronounced /'zi:t? /? Chinese name: Zeta

The coefficient, azimuth, impedance, relative viscosity

η is pronounced as /'i:t? /? Chinese name: Ita

Represents hysteresis coefficient, mechanical efficiency

Greek alphabet

Greek alphabet is a letter used in Greek, and it is also widely used in mathematics, physics, biology, astronomy and other disciplines. Greek letters are similar to English letters and Russian letters, but with different symbols and the same phonetic properties. Greek letters are the earliest letters with vowels in the world. Cyrillic letters and Georgian letters used in Russian and Ukrainian are all developed from Greek letters, so people who have studied Russian will feel deja vu when they use Greek letters.

develop

In 800 BC, the Greeks borrowed all the Phoenician letters. However, they found that Phoenician letters, which had no ability to express vowels, had many inconveniences when writing Greek with extremely rich vowels. At the same time, many phoenician consonants do not exist in Greek. The clever Greeks then kept some consonant forms, but gave them the function of expressing vowels.

In 400 BC, the Phoenician-Greek alphabet, which had developed for hundreds of years, was introduced into Athens from the city-states outside Greece. Almost at the same time, great philosophers such as Thales, Pythagoras and Heraclitus sprang up in Greece. The golden age of western culture has begun. The Greeks got the latest high-tech achievement of "letters" from the Phoenicians, and soon used letters in their own civilization. It is precisely because they spared no effort to apply letters that the thoughts of ancient Greek philosophers can be passed down to this day.