可以操作声子并只让它们向一个方向流动的设备正在被建造，这是二极管的热等价物。
Far from it. Devices are being built that can manipulate phonons, allowing them to flow in one direction only, for example - the thermal equivalent of a diode.
有组织的零售商向小城市和内地的迁移，以逃避竞争和猛涨的租金，随着这一进程，他们面临的是消费者品味的巨大落差和极敏感的价格。
As organised retailers move to smaller cities and further inland to escape competition and soaring rents, they face huge variations in taste and extreme price sensitivity.
如果我们感到内心有什么东西将我们向两极拉扯，哲学能向我们提供怎样的启示？
If we feel something within ourselves drawing us in one direction but also something drawing us the other way, what exactly can philosophy do to offer us illumination?
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