Why might other people's estimates of what something is worth lead you tochange your own?
为什么其他人对某种东西的评价有可能导致你改变自己的评价呢？
2
Whenever preparing project estimates, always note that hardware costs are subject tochange.
一旦准备进行项目估算，永远都要记住，硬件成本是与变化息息相关的。
3
According to some estimates, black carbon may be responsible for as much as 18% of the planet's warming, making it the No. 2 contributor to climate change after carbon dioxide, which accounts for 40%.