例句與造句

1. Architects had to devise a way to lay the wooden forms for the placement of concrete underwater.
2. These included adding reinforced concrete shields around the pilotis ( to protect them from blast damage ); hardening 10th Street under the roadway with structural steel and reinforced concrete; permanent removal of the taxicab stands; the creation of a lobby around the west building core ( to protect employees as they left the building ); and the placement of concrete benches, concrete planters, and steel bollards along Independence Avenue and 10th Street.
3. It's difficult to find placement of concrete in a sentence. 用placement of concrete造句挺難的