地板上还有不少混合着石膏结晶的沙粒，这是在波士顿步行不可避免会带上的痕迹。
There are traces of sand, mixed with crystals of gypsum. A typical mix picked up from walking the city of Boston.
储量可以持续数百年，因此即使在所有的汽车都成为混合动力或电动的这种不可能发生的情况下，也有足够的锂来满足我们的需求。
The reserves could last for centuries, so there will be enough lithium to fill up our tanks even in the improbable case of all cars becoming hybrid or electric.
或许是因为它们是不可能达成的雄心与琐碎小事的奇怪混合。
Perhaps because they are an eccentric mix of the impossibly ambitious and the trivial.
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