Sustainability isn't an option anymore—it's a necessity for any business that wants to thrive in the 21st century.
可持续性不再是可选项，而是任何想在21世纪蓬勃发展的企业的必需品。
解析：吃粗粮，喝清水，弯起胳膊当枕头，这其中也有着乐趣。
The theory of probabilities is at bottom nothing but common sense reduced to calculus.
模形式的算术是理解数论更深奥谜团的关键。
最大的恶和最严重的罪行是贫穷。
作家被委派去宣告和庆祝人类已被证明的伟大心灵和精神——在失败中的英勇，勇气，同情和爱。在对抗软弱和绝望的无尽战争中，这些是希望和效仿的明亮旗帜。
We must balance the need for affordable energy today with the imperative of building a sustainable energy future.