农业现代化不是简单的机械化，而是整个产业链的智能化升级。
Agricultural modernization is not just mechanization but the intelligent upgrading of the entire industrial chain.
The true cost of food isn't just what you pay at the store—it's what the planet pays over time.
So we beat on, boats against the current, borne back ceaselessly into the past.
光波，无论是以太波还是其他波，在所有情况下都是时间上的周期性过程。