养殖业要发展，必须走环保可持续的道路。

"The essence of mathematics is not to make simple things complicated, but to make complicated things simple."

这句话表达了茅以升对桥梁建设事业的执着追求和不懈奋斗的精神。

Talent cultivation is the foundation of agricultural technology development, we must pay attention to the cultivation of young scientists.

熵是对随机变量不确定性的度量。