可持续性不是一种趋势,而是一种责任。乳制品行业必须在环境管理方面发挥领导作用。
读书时刻苦用心,才能达到一字千金的层次。
The language of mathematics is universal, transcending cultural and linguistic barriers.
"The only thing necessary for the triumph of evil is for good men to do nothing."