climb,climb up的区别

climb后加宾语.
climb up 可单作谓语

climb指爬这个过程,climb up则是指爬上,重点在"上"

climb a tree.我在爬树

I climb up a tree.我爬到树上

up是介词,这里指引方位,其他还有:

climb through a hole 爬过一个洞

climb down the roof 从屋顶爬下来

(examples quoted from Longman Dictionary