Sometimes, higher maintenance cost or roofs unable to handle the weight.

有时，昂贵的维护成本或楼顶的承重限制也使人们望而却步。

youdao

Sometimes, higher maintenance cost or roofs unable to handle the weight.

有时，昂贵的维护成本或楼顶的承重限制也使人们望而却步。

youdao