登山者小心翼翼地开始了他们的下山之旅。

The climbers carefully started their ___descent down the mountain.

这座山有一条陡峭的下坡路，骑车时要小心。

This mountain has a steep ___descent that requires caution when cycling.

他经常谈起他的意大利血统。

He often talks about his Italian ___descent.

城堡的守卫们警惕着敌人可能的突然袭击。

The castle guards were alert for any sudden ___descent of enemies.