r

美音音标: [ɑː(r)] r
英音音标: [ɑː(r)] result.0.expl|add:"

解释
字母;

同义
roentgen r
词性
n
解释
a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air
示例
None

同义
gas constant r universal gas constant
词性
n
解释
(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
示例
None

同义
r
词性
n
解释
the 18th letter of the Roman alphabet
示例
None

同义
r radius
词性
n
解释
the length of a line segment between the center and circumference of a circle or sphere
示例
None