We had to backtrack to the corner and cross the street.我们不得不原路返回到拐角处过街。Can we just backtrack a little bit and look at your primary and secondary education?我们能不能回过头来谈谈你的小学和中学教育？Air cargo loading problem by backtrack algor...
清除街道上淤积的雨水是谁的工作?Whose job is it to clear the accumulated rainwater from the streets?如果航道和港口出现了泥沙淤积的问题,那么就必须要解决它.It requires effective solutions if the port and waterway sedimentation problems occur.淤积的主要原因是回流淤积.The silta...
Many of our teachers also have valuable academic links with Heidelberg University...我们的很多老师也和海德堡大学保持着有益的学术联系。New four colour printing press outside of Heidelberg, CTP technology.全新对开海德堡四色印刷机, CTP技术.City view of Heidelber...