1, put the computer's input method into Chinese input state, as shown in the following figure;

2. Then enter "theta" on the keyboard, as shown in the figure below, θ will be displayed in the candidate words.

The capital θ of the extended data is: five quarks are represented by θ+in particle physics.

The lowercase θ is: the angle that often represents a plane in mathematics.

Silent fricatives in the International Phonetic Alphabet, Cyrillic? It's from Sita.

It is also a symbol of Earth Day. In English, θ belongs to the fricative sound in consonants.

The application is as follows:

Baidu Encyclopedia-θ