如果可能，应追查谣言的源头。If it's possible, track the rumour back to its origin.探险者在中非找到了尼罗河的几处源头.Explorers traced the Nile River to its several headstreams in Central Africa.我们溯河而上,直到源头.We traced the river to its source....
The seas grew turbulent, tossing the small boat like a cork.海浪变得汹涌澎湃，把小船像漂浮的软木塞一样抛来甩去。a short and turbulent career in politics短暂动荡的政治生涯The present international situation remains tense and turbulent.当前的国际局势依然紧张动荡....
My tireless little cilia make about ten sweeping strokes a second.我那不怕疲劳的小纤毛每秒钟约做10次清扫动作.You should learn to use short and quick strokes with little backswing.你应该学会用小的引拍动作,用短促的爆发力击球.Any sailor who disobeys will be punish...