This is called a rarefaction and is represented by widely spaced dots.这个区域称为稀疏区,并用疏散的小点表示.The classical elementary waves in Riemann solutions include rarefaction wave, shock wave and contact discontinuity.黎曼解涉及的经典基本波包括疏散...
The men support the ballerinas, who pose with their uplifted arms.男演员托举着女芭蕾舞演员，她们在上面抬臂摆出造型。The onstage ballerinas are seemingly of the uniform height.台上演出的芭蕾舞演员似乎都一样高.The ballerinas were toeing the line.芭蕾舞女演员踮起脚尖,排成一行....
My life was very hectic but empty before I met him.在遇到他之前，我的生活非常繁忙却很空虚。Despite his hectic work schedule, Benny has rarely suffered poor health.尽管工作繁忙，本尼却少有身体不好的时候。The last few weeks have been hectic.过去几周一直忙得不可开交。...