They usually operated in bands between ten and twenty strong and relied for survival on difficult terrain and bad transport.

他们通常以10到20人的队伍作战，很坚强，依靠艰难的地形和糟糕的交通条件生存下来。

youdao

Asia, with its multiplicity of cultures and customs, is a particularly difficult terrain.

亚洲有着多样的文化和习俗，是一个特别复杂的地区。

youdao

In this difficult terrain there isn't enough land to go around.

这里地形险恶，土地稀少。

youdao

"It is complex difficult terrain, both the land and the people, it is a tribal society with a culture vastly different from what most of us are familiar with and it varies around the country, so you cannot assume what is true in one province is true in another,".

VOA: standard.2009.10.01

She says the work still is not easy, though,considering this is the country's worst flooding in more than 80 years and the area's mountainous terrain can make transportation difficult, even in the best of weather.

VOA: standard.2010.08.02

It says that their peacekeepers are spread thinly over a vast and difficult terrain.

BBC: UN combat force to target DR Congo rebels

This will happen within the next two months, posing new obstacles for attackers in difficult terrain.

ECONOMIST: Pakistan and the Taliban

There is no question that neurocriminology puts us on difficult terrain, and some wish it didn't exist at all.

WSJ: Neurocriminology: Inside the Criminal Mind