求翻译：1月11日，上海世博会各项工程施工队伍在雪中举行誓师大会，承诺争分夺秒冲刺，确保在3月底全面完成世博园区建设任务，为世博会4月中旬试运行奠定坚实的基础。是什么意思？

January 11, the construction of Shanghai World Expo will be held in the snow oath-taking rally team, committed to race against time to sprint, at the end of March to ensure full completion of the Expo site construction tasks for the World Expo trial operation in mid-April to lay a solid foundation.

On 11 January, and the Shanghai World Expo in the snow in the construction of the project team held every minute 10.000 Sprint, commitment fully completed by the end of March, to ensure that the World Expo Park construction tasks, and in mid-April to the Expo will provide a solid foundation test run

On January 11, the Shanghai World Expo each project construction troop holds the pledge assembly in the snow, pledged races against time the sprint, guarantees comprehensively completes the world abundant garden area construction task in at the end of March, mid-April tries for the World Expo to mov

January 11 Shanghai Expo project construction team in snow at swearing-in, promise clock Sprint to ensure complete the Expo site construction tasks in late March, Expo April mid-pilot to lay solid foundation.

January 11 Shanghai Expo project construction team in snow at swearing-in, promise clock Sprint to ensure complete the Expo site construction tasks in late March, Expo April mid-pilot to lay solid foundation.