Stuttering and speech defects appear almost exclusively in boys .

口吃和发音缺憾在男孩之间非常普遍。

Are there racial , national trends in the stuttering syndrome ?

口吃症和种族、国籍有什么关系吗？

Those with speech rhythm and fluency problems , such as stuttering ;

讲话节奏和流畅性有问题的患者，如口吃患者

By most accounts , mr. obama and his stuttering lawyers were all but laughed out of the courthouse .

亲历审理的人多数认为，奥巴马先生和他口吃的律师们几乎是被笑出了法院大门。

With luck , the causes of stuttering should soon be understood better .

幸运的话，引发口吃的原因很快就会被更好的理解了。