What you actually pay for something is at least twice the listed price because of the energy， time， money needed to set it up， learn， maintain， repair， and dispose of at the end. Not all prices appear on labels. Actual costs are 2x listed prices.

文明的冲突将主宰全球政治。文明之间的断层将成为未来的战线。

过去是一个异国；他们在那里做的事情不同。

儿童书籍应该既是一面镜子，也是一扇窗户。