device consisting of an artificial egg left in a nest to induce hens to lay their eggs in it
nest egg的用法和样例:
例句
A graying work force focusing on rebuilding its nest egg while the young struggle for entry doesn't bode well for an economy dependent on sprightly consumers. 老年劳动力专注于积攒养老金,年轻人则努力寻找工作机会,这种状况对依赖于强劲消费的美国经济来说并不是什么好兆头。
The money you saved up is a nest egg. 你储备的钱就成了储备金。