rill
n
1 vibrating sound made by the voice or in bird song (人或鸟发出的)颤动声.
2 (music 音) (sound of) two notes a tone or a semitone apart being played or sung several times one after the other (音的)颤动; 颤音.
3 speech sound made by pronouncing `r´ while vibrating the tongue (舌的)颤音, 颤动辅音. trill, v [I, Ip, Tn]
1 sound or sing (a musical note) with a trill 用颤音发声; 用颤音唱(某乐音)
The canary was trilling away in its cage. 那只金丝雀在笼中鸣啭.
2 pronounce (a letter) with a trill 用颤音发(某字母)的音; 发某字母的颤音.