Companies that focus on the bottom of the pyramid can create profitable businesses while serving the poor.
关注金字塔底层的企业可以在服务穷人的同时创造盈利业务。
"The choices we make today will echo in the lives of generations to come."
Systems have sub-systems and sub-systems have sub- systems and so on ad infinitum - which is why we're always starting over.
解释：大多数果实都带有酸味，而覆盆子却是甘甜的，体现了中药味道的多样性。
理论地理学是空间科学的女王。