他们在非常恶劣的条件下生活和工作。

They live and work in very ___hostile conditions.

探险者在北极地区面临着恶劣的气候。

The explorers faced a ___hostile climate in the Arctic.

许多植物无法在如此贫瘠的土壤中生根。

Many plants cannot take root in such ___hostile soil.