无产阶级是普遍的阶级，他们的根本锁链是可以破裂的阶级。

Great truths are even more simple than I thought they were....

Sustainability is not an option; it's a necessity for the future of our industry.

乳制品行业有责任在环境管理方面发挥领导作用。

知识只有在它有助于人类解放时才有价值。