2. Because it takes years to find and then exploit new reserves, demand can
outstrip supply for long periods.
因为发现并开采新的储藏需要数年时间,供不应求可能长期持续。
3. A new report suggests that America's demand for cancer treatment will
outstrip supply by the end of the next decade.
一项新报导表明在下一个十年末美国对于癌症治疗的需求将超过供给。