R 详细解释

R

[ɑ:]

n. 字母r

词形变化

名词复数: r's |

英英释义

名词 r:

a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air

同义词:roentgen

(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole

同义词:gas constant, universal gas constant

the 18th letter of the Roman alphabet

同义词:letter r

the length of a line segment between the center and circumference of a circle or sphere

同义词:radius

例句

1. a faRm woRth neaRly R1,3 million.价值近130万兰特的农场。 2. 198.6 °R.列氏温标198.6度。 3. Elizabeth R.伊丽莎白女王。 4. The movie is Rated R.这部电影为R级。 5. Sen. Jane Smith R-PA宾夕法尼亚州共和党参议员简·史密斯 6. R. TRent特伦特河