(亦作r)
(pl. Rs 或R's)
1- the eighteenth letter of the alphabet英语字母表中第十八个字母。
1.1
- denoting the next after Q in a set of items, categories, etc.R项, R类（一组项目、分类中的第十八位）。
短语
the R months
- the months with R in their names (September to April), considered to be the season for eating oysters.R月份（指名称带R的月份, 即九至四月, 据说是吃牡蛎的季节）。
the three Rs
- reading, writing, and arithmetic, regarded as the fundamentals of learning.3R课程（指读、写、算这三种基础教育课程）。
1.1
- rand.同RAND:
a farm worth nearly R1. 3 million.
价值近130万兰特的农场。
1.2
- (in names of sports clubs) Rangers or Rovers.用于运动俱乐部名称同Rangers或Rovers.
1.3
- Réaumur列氏温标的：
198.6°R.
列氏温标198.6度。
1.5
- （亦作®）registered as a trademark注册商标。
1.6
- (in the US) Republican.（美国）同REPUBLICAN.
1.7
- US (in film classification) restricted (denoting films restricted to viewers over seventeen years of age)〈美〉（电影分级）同RESTRICTED（限17岁以上观众观看）。
1.8
- (on a gear shift) reverse.（变速杆, 换挡杆）同REVERSE.
1.9
R.
River (chiefly on maps).同River（主要用于地图）。
1.10
- roentgen(s).同ROENTGEN或roentgens.
1.11
- Romania (international vehicle registration).同ROMANIA （国际车辆注册用语）。
1.12
- rook (in recording moves in chess).同ROOK（记录国际象棋棋步）：
21.Rh4.
第21步：车h4.
1.13
- Cricket (on scorecards) run(s).【板球】（记分卡标志）同RUN或runs.