1·Meanwhile, they called to one another in their distinctive, creaky trill.
与此同时，它们用叽叽嘎嘎与众不同的颤音彼此呼唤。
2·Their song consists mainly of a rapidly repeated note, like a trill.
它们唱的“歌”主要是在快速重复一个音符，类似一种颤音。
3·This may be appropriate for beginners or youngsters who have not yet learned to trill.
这种方式或许对于初学者及尚未学习颤音的琴童适用。
4·A large number of techniques are used when playing these wind instruments such as tapping appogiatura tremolo legato "flower tongue" augment glide trill overtone and prong .
演奏时运用了大量的技巧，如震音、连奏、花舌音、垛音、滑音、颤音、泛音、叉口等。
5·Therefore, matching the trill to the other hand for practice defeats the lessons of this Invention.
因此，为了练习而刻意使颤音与另一只手相配合，会使得这支创意曲的教学效果大打折扣。