On hills, he must use low gears.

在山上，他必须用低速挡。

《柯林斯英汉双解大词典》

It's a dog on hills.

这是一只在山丘中的狗。

youdao

To stay safe, do not stand under trees, on hills or near water.

安全起见，不要站在树下、山上或水边。

youdao

It's not always how it is on like things like the Hills and stuff like that. And you know, it's...

事情不总是像比佛利山庄那里那样的。你知道……

好莱坞的真面目 - SpeakingMax英语口语达人

Up to 4cm (1.6in) could fall on lower ground, with more than 10cm (4in) possible on hills.

BBC: Snow hazards on roads in north Wales

The Met Office said Friday's snow showers would continue into Saturday, with most of it falling on hills.

BBC: West Yorkshire braced for further snowfall

Within the past three decades, vintners have planted grapes on hills around the area, taking advantage of rich soil, a suitable microclimate and southern-facing slopes.

BBC: Travel - The tragic story behind Canada��s newest World Heritage Site