trill

名词 trill:

1. a note that alternates rapidly with another note a semitone above it
   同义词：shake
2. the articulation of a consonant (especially the consonant `r') with a rapid flutter of the tongue against the palate or uvula

动词 trill:

1. pronounce with a trill, of the phoneme `r'
2. sing or play with trills, alternating with the half note above or below
   同义词：warble, quaver

1. 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。
2. This is a letter with a trill.
   这是个发颤音的字母。
3. The canary was trilling away in its cage.
   那只金丝雀在笼中鸣啾。