R (capital) r (lowercase) is the 18th letter of the Latin alphabet.

1. medicine

r of medicine? Refers to people's breathing frequency. For example, the r of a normal person is ≈ 16 ~ 2 times/minute.

in medicine (physiology), the positive r refers to the right hand.

2. Computer

R is an editing language for statistics. Please refer to R language.

3. Architecture

R of architecture is a non-metric unit for measuring thermal resistance.

4. Calendar

R of calendar is often used as the abbreviation of Thursday in English to distinguish Tuesday with T as the abbreviation.

5. Chess

The R of chess stands for Rook, which is equivalent to the car of China chess.

6. Primary colors

R of primary colors means that the additive color system is the red of the three primary color systems of light (red, green and blue).

7. Traffic

When driving a vehicle, R is the reverse gear.

8. Movies

In the United States, movies are classified according to the Motion Picture Association of America, and the R level is equivalent to the restricted level of Chinese, which is not suitable for minors to watch.

9. Law

R of the law is the code name when the court quotes the king (Rex) or the queen (Regina) in the country that recognizes the British monarch as the head of the country.

1. Telecommunications

The International Telecommunication Union (ITC) takes R as the initial code representing Russia.

11. Japanese

When converting Japanese characters into Roman Pinyin, choose R to represent the consonant (the ninth line) of the pseudonym "ら" instead of L.

12. Chinese

In Chinese, R mostly refers to the Chinese character "day", which is common on the Internet.

means "MR": nowadays, this kind of abbreviation is popular in the society. Adding "R" after a man's surname means addressing him, leaving out the "M" of "Mr". Similarly, women use "s"

a registered trademark

when labeling a trademark, should you put a note in the upper right corner? /? Add r in the circle, which is the mark of "registered trademark", that is, "?" , which means that the trademark has been registered in the State Trademark Office and has been examined and approved by the Trademark Office, and has become a registered trademark. R in the circle is the initial letter of English register registration.

This sign indicates that the trademark has been registered and protected by law. No enterprise or individual may use it without the permission or authorization of the registered trademark owner, otherwise it will bear the tort liability, which is different from the meaning of "TM".

use "?" It is the meaning of trademark symbol (enterprises use "?" Usually it means that this text, figure or symbol is used as a trademark), that is, the text, figure or symbol marked TM is a trademark, but it is not necessarily registered.

"TM" is the abbreviation of English trademark (it should be noted that words, words and symbols that have become registered trademarks cannot be used as registered trademarks in actual use if the font version used is different from that used in registration? Symbol).