但现有存量住房节能问题也比较困难，因为成本很大。

However, the energy problem of existing housing stock is more difficult because of the great cost.

youdao

你在南亚可以看到，那里不仅需要基础设施，而且还需要提高管理现有基础设施存量的能力。

What you can observe in South Asia is not only is there a need for infrastructure, but there's a need to be able to manage the current stock of infrastructure better.

youdao

不过，现有房产的存量虽然有所下降，但是还是保持高位。

But the inventory of existing houses, while falling, remains high.

youdao