buy up sth.中等

Now, with record-high home prices and historically low inventory, there’s an increased urgency in such regulation, particularly among those who worry that developers will come in and buy up swaths of housing to flip for a fortune on the short-term rental market.

如今，房价创下历史新高，房源库存处于历史低位，此类监管变得更加紧迫，尤其是在那些担心开发商会进场大量收购住房、再投放到短租市场上转手牟取暴利的人看来。