| 词汇 | R, r |
| 释义 | R, r noun uk/ɑːr/ us/ɑːr/ Rs, R's or r's (LETTER) [ C or U ]（英语字母表的第18个字母） the 18th letter of the English alphabet (RIVER) 河，用在河流名称的前（或后）（river的缩写） written abbreviation for river , used in writing before or after the name of a river R Thames 泰晤士河 (DIRECTION) 右（right的缩写） written abbreviation for right (ROYAL PERSON) 国王;女王（用在国王或女王的名字后，Rex或Regina的缩写） abbreviation for Rex (= king) or Regina (= queen), used after the name of a king or queen Elizabeth R 伊丽莎白女王 R, r adjective uk/ɑːr/ us/ɑːr/ (ROYAL) 皇家（用于英国的组织名称中，royal的缩写） written abbreviation for royal , used in the names of organizations in the UK He's an RAF (= Royal Air Force) officer. 他是一名英国皇家空军军官。 RSPH, the Royal Society for Public Health RSPH，即皇家公共卫生学会 (DIRECTION) 右的（right的缩写） written abbreviation for right R eye: 3.20/L eye: 3.25 右眼: 3.20／左眼: 3.25 (FILM) [ C or U ] US（影片）限制级的（指17岁以下青少年无家长或监护人陪同不得观看，restricted的缩写） abbreviation for restricted : used to refer to a film that people under 17 years of age can see only if a parent or guardian is with them R, r adverb uk/ɑːr/ us/ɑːr/ 右的（right的缩写） written abbreviation for right R noun [ S or U ] mainly UK uk/ɑːr/ us/ɑːr/ (also R0) （感染率）R值 symbol for reproduction number: the average number of people that one person with a particular disease infects An R of less than 1 means that the virus will eventually die out. 感染率R值小于1表明病毒最终将会消失。 R was estimated to be 1.46 for H1N1 in 2009. 在2019年，H1N1的感染率R值为1.46。 The key R rate of measuring COVID-19 spread rose owing to care home infections. 因为养老院内的感染，代表COVID-19传播速度的R值上升了。
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