'it's not so easy to prepare the sewer for visitors,' says Mr. Gottschall in Vienna, an engineer who once designed sanitary works.
维也纳的戈特沙尔说，在下水道开门迎客前做好准备工作并不是件容易的事。他是一位工程师，曾经设计过卫生工程项目。
The Antique Wine Company once designed a cellar at the top of a 30 story building in Mexico City.
AntiqueWine公司曾经在墨西哥城的一幢三十层的楼房的楼顶设计了一个酒窖。
Our country's old professional technician management system was once designed for planning economy.
推行执业资格制度是我国转变专业技术人员管理方式的重要内容之一。
I was satisfied when I was first engaged with this "big name" company which has once designed the tallest building in China.
在我顺利加入这家设计过曾是中国最高建筑的知名企业之初，我满意极了。
Once designed, hardware is difficult and expensive to change.
硬件一旦设计完毕，要修改是困难的，并且花费也大。
Once designed, hardware is difficult and expensive to change.
硬件一旦设计完毕，要修改是困难的，并且花费也大。
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