An uphill slope or gradient inclines upwards. An uphill climb involves going up a slope.
a long, uphill journey.
一段漫长的上坡路。
If you refer to something as an uphill battle or an uphill struggle, you mean that it requires a lot of effort and determination, but it should be possible to achieve it.
It had been an uphill battle to achieve what she had wanted.
她历经艰辛才达到目标。
If something or someone is uphill or is moving uphill, they are near the top of a hill or are going up a slope.
He had been running uphill a long way.
他已经跑了很长一段上坡路。
The man was no more than ten yards away and slightly uphill.
那个男子就在不到10码远、稍微靠近山顶的地方。