攀

例句：

1. 1. The mountain is too steep for me to climb up without a rope.
   这座山太陡了，我不带绳子爬上去很困难。
2. 2. The climbers reached the summit of the mountain after hours of hard work.
   经过数小时的艰苦努力，登山者最终到达了山顶。
3. 3. The climbers started their ascent early in the morning.
   登山者们一大早就开始了他们的攀登。