The birds are hard to observe, as they live in a region of mountainous forest, so the researchers have attached tiny cameras to the tails of some birds, as one method of investigating their behaviour.

这些鸟很难观察，因为它们生活在山区森林里，所以研究人员在一些鸟的尾巴上安装了微型摄像机，以此作为一种研究它们行为的方法。

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The paper introduced the tigers 'biological habits and their main distribution, which is also an ideal habitat in mountainous forest in the middle of Naming Mountains.

本文介绍了华南虎生物学习性，提出南岭中段山地林区是华南虎现今分布的中心地带，并有较理想的栖息地。

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River valleys and hills make the northern Luzhou a land of honey and milk. Its southern mountainous area boasts rich forest and mineral resources.

河谷和山丘让泸州北部成了极度富庶的地区，泸州南部多山，有大量的原始森林和丰富的矿产资源。

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After bailing out of his plane over a mountainous Chinese forest after the Tokyo raid, he became ill with malaria, and almost died.

CNN: A final toast for the Doolittle Raiders

Back on board en route to Severobaikalsk, the land become mountainous and we passed dense forest bisected by wide rivers and glacial streams.

BBC: A train to nowhere in Siberia

In Wyoming, more experienced fire managers and crews took over the fight against a wildfire burning in a rough, mountainous area of the Medicine Bow National Forest.

MSN: Nuns, Boy Scouts among new wildfire evacuees