Sustainability is not an option; it's a necessity for the future of farming.
The most important thing in mathematics is to understand the concepts, not just to memorize formulas.
释义:即使家庭贫困,也要保留读书的希望;即使生活富裕,也不能忘记劳动的艰辛。
The tragedy of great power politics is that even well-intentioned states are forced to act in ways that can lead to conflict and war.
Any sufficiently advanced technology is indistinguishable from magic.