单语范例（未经PONS编辑处理）
In early 1940, the boat was called into combat duty due to the shortage of available submarines.
en.wikipedia.org A single daily goods train continued to run until 1947, when coal shortages forced its temporary withdrawal.
en.wikipedia.org With the war going on, food shortages occurred, especially in the winter of 1916/17.
en.wikipedia.org A shortage of capital and constant problems with washed-out tracks barred further extensions.
en.wikipedia.org The school struggled initially, closing three times: in 1863 for lack of students, and again in 1867 and 1876 due to shortage of funds.
en.wikipedia.org