单词详解
n.
A. 英语字母的第十八个字母,小写为r (the 18th letter of the Roman alphabet)
The trilled “r” is produced by vibrating the tongue against the upper teeth.
发带颤音的“r”,舌抬向上齿颤动而成。
B. abbr.
电阻(resistance);比率(ratio);医生处方(recipe)