一个破坏其土壤的国家是在自我毁灭。
A nation that destroys its soils destroys itself.
The choices women make in their careers are often constrained by societal expectations and institutional barriers.
是印度给了我们表达所有数字的巧妙方法，每个符号都有一个位置值和一个绝对值。
安全不是产品，而是一个过程。