Innovation is the key to sustainable agriculture.

What you actually pay for something is at least twice the listed price because of the energy， time， money needed to set it up， learn， maintain， repair， and dispose of at the end. Not all prices appear on labels. Actual costs are 2x listed prices.

有时候生活会用砖头打你的头，但不要失去信心。

书是一份永远不会失去价值的宝藏。

船舶自动转向的引入是一个稳定性问题，而非准确性问题。