The journey of scientific discovery is filled with challenges, but it is also incredibly rewarding.
活着即选择，选择即放弃。
皮革鞣制的创新不仅仅关乎新化学品，而是重新思考材料的整个生命周期。
Coal companies must fulfill their social responsibilities while pursuing economic benefits.
殖民地是一个新人类计划将被测试的地方，在那里一个无国界、无种族和无国家世界的梦想将被实现。
经济模型的价值在于其解释和预测的能力。
发现的喜悦是科学家们前进的动力。
The arithmetic of algebraic groups is a key to understanding the Langlands conjectures.