sonorously       
adverb  formal uk/ˈsɒn.ər.əs.li/ us/ˈsɑː.nɚ.əs.li/
 (声音)浑厚地
in a way that has a deep, pleasant sound
  A large bearded man lifted her into his arms and laughed sonorously. 一个大胡子男人把她抱在怀里,发出郎朗的笑声。 
 He never said anything important, but he always said it sonorously.  他从不说什么重要的事,但他总是把话说得冠冕堂皇。 
 See: sonorous
 - More examples
 - "I am highly honoured to welcome you," he said, speaking sonorously in his own language.
 - As she passed the church, the clock struck three sonorously into the still afternoon air.
 - "Friends," he announced sonorously, "we have all been greatly shocked by recent events."