On the descents, cyclists spin past cars, freewheeling downhill at tremendous speed.

在下坡道上，自行车手们飞快地掠过汽车，靠惯性极速冲下山去。

I no longer want to make such dangerous descents.

我不想再作这么危险的俯冲了。

Nightmares, these descents into hell, did they make sense?

噩梦，正如坠入地狱一样的恐怖，它的存在有意义吗？

The book is full, you will see, of a number of descents and ascents.

你们将会读到，本书充满一些下降与上升的句子。

Though a number of descents have been made, much of it still remains to be explored.

人们多次进入洞内探险，但至今尚有不少东西有待勘探。