The metropolis has always been the seat of the money economy.
Your voice can change the world.
Integrity is the foundation of an enterprise; without integrity, there is no market.
The health of our oceans is directly tied to the health of our planet - and ultimately, to human health.
The only way to learn mathematics is to do mathematics.
如果农民不能有效使用,最先进的技术也毫无价值。