Such a quantity of material would have blocked the sunlight completely from reaching the surface, plunging Earth into a period of cold and darkness that lasted at least several months.
如此大量的物质会完全阻挡阳光到达地表，使地球陷入至少持续数月的寒冷和黑暗之中。
2
Accordingly, there can be no assurance as to the quantity or quality of such rare earth deposit or that such deposit will become proven or probable reserves.
因此也不可能保证稀土矿床或其他类似矿床的数量和质量能被核实或被合理地储备起来。
3
To look at the total quantity of water on Earth, some 96.5 per cent of it lies in the oceans (and is, most unhelpfully, salty).