In Canada and America every big city has at least one skatepark, but it's hard to skate on the streets people don't like it.

在美国和加拿大，任何一个大城市都会有最少一个滑板场，但是街道上就不允许滑板。

Because the structure of Xin-Jiangwan skatepark project is a special multi-curved shell slab structure, the construction technique and application study are also written in this thesis.

此项目研究的基于性能的多指标综合设计方法不仅可以运用于高致密可调凝喷射混凝土的研制，也可以运用于其它高性能混凝土的研究中。