In Taylor's picture,the eddy is the basic element of turbulence.在泰勒的描述里,旋涡是湍流的基本要素。 57 serene adj. 安详的,宁静的,平静的 参考例句: He has entered the serene autumn of his life.他已进入了美好的中年时期。 He didn't speak much,he just smiled with that serene smile of...