1, mc refers to My World: My World (translated from Chinese into My World) is a sandbox building game, where players can build or destroy squares with various squares in a three-dimensional world. It was put into trial operation on May 7, 2009, and officially released on May 20, 2009.

2.mc refers to methyl cellulose: methyl cellulose is a nonionic cellulose ether, which is made by introducing methyl into cellulose through etherification reaction. Methyl cellulose has four important functions: thickening, surface activity, film formation and thermal gel formation.

3.mc refers to marginal cost: marginal cost refers to the increment of total cost per unit of newly produced products. This concept shows that the cost per unit product is related to the total product.

4.mc refers to MC new material library: MC new material library is the only innovative material consulting service organization with globalization background in the world and the largest integrated application library of innovative materials and sustainable materials in the world.

5.mc refers to terbium: Terbium is a synthetic radioactive metal element with atomic number 1 15, which belongs to one of the weak metals. Mc is the heaviest element in the VA group of the periodic table, but its characteristics have not been verified by chemical experiments because there is not enough stable Mc isotope.

6.MC is the person who controls the microphone: short for microphone controller, that is, the person who controls the microphone. The performance form he is good at is called "Shouting Mai". For example, this year's hottest Rap is very similar to MC's Rap, which can be said to be a simple version of Rap. It also has a strong sense of rhythm and pays attention to rhyme.

7.MC is the host: MC: the host means. In many activities and celebrations, the host is usually called the master of ceremonies. Their job is to guide the activities, interact with the audience and keep the activities going smoothly.