The magnitude – estimated to be 8.3 at the  most – is not the worst scientists have recorded, but the quake struck a dense and  populated area with loose structural bases.

震级 - 估计最多为 8.3 - 并不是科学家记录的最严重的震级，但地震发生在人口稠密且结构基础松散的地区。

In just three months to be precise … Concrete is a structural material that's cheaper  on a structural loading basis than steel might be, but it requires onsite speciality labour which  can slow down the construction process.

准确地说，只需三个月… … 混凝土是一种结构材料，在结构载荷基础上比钢材便宜，但它需要现场专业劳动力，这会减慢施工过程。