He will travel some 35000 kilometers,while having on board only food and medicines.

问题描述:

He will travel some 35000 kilometers,while having on board only food and medicines.
.翻译并解释some有什么作用(就是好好的为什么要加some?)

他将旅行大约35000公里,而船上只有食品和药品.
some在这里是大约,若干的意思.跟about似的.