1、
At one point a bird trilled in the Conservatory.
有那么一刻，一只鸟儿在温室里啼叫。
2、
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.
词典精选例句
3、
4、
5、
6、
