The success of aquaculture lies in balancing yield and ecology.
解释:过去和现在风俗不同,为什么一定要效仿古代?
The state is the most important institution in human society, and its strength or weakness is the key determinant of a society's success or failure.
蔬菜种植不仅是生产,更是一种责任,我们要为消费者的健康负责。