如果这个群体面临食物短缺的困难，那么这个群体中的个体将比其他群体更晚达到生殖成熟。
If the group faces food scarcity, individuals in the group will reach reproductive maturity later than otherwise.
1943年埃莉诺·罗斯福促成了回归“胜利菜园”活动，该项活动在第一次世界大战时在那些面临食物短缺问题的国家所普及。
In 1943 Eleanor Roosevelt encouraged a return to the "victory gardens" that had become popular during the first world war, when the country faced food shortages.
冬天来了，人们正面临着食物和燃料的短缺。
Winter is setting in and the population is facing food and fuel shortages.
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