According to the vulgar idea, the fire in his laboratory had been brought from the lower regions, and was fed with infernal fuel;

按照一种粗俗的说法，他实验室中的火来自下界，而且是用炼狱的柴薪来燃烧的；

If you feel the jolt of the ship's hull ripping open against a reef or you see water rushing in, don't await instructions, especially if you're in the boat's lower regions.

如果你感到船体碰上暗礁开裂的颠簸，或者看见水涌了进来，那就不要等待指示，尤其是如果你位于船体较低的部位。

Since the lower regions of the cable are moving slower than the higher ones, a rising car will lag behind the orbiting anchor, causing a drag on the cable that could destabilize the entire assembly.

由于较低部位的电缆比较高部位的电缆移动慢，上升的电梯箱将落后于转动锚点，这样就会引起一个拖拽并可能进一步破坏整个装置的稳定。

Most of Africa is urbanizing at a lower level of income than other regions of the world did.

非洲大部分地区的城市化收入水平低于世界其他地区。

The areas that are now desert were, like all arid regions, very susceptible to cycles of higher and lower levels of rainfall, resulting in major, sudden changes in distributions of plants and animals.

那片现在是沙漠的地区和所有干旱地区一样，对降雨量相对更大或更小的周期极为敏感，因此那里的动植物分布发生了巨大且迅速的变化。