Birds shelter in nests, rock overhangs, trees, and dense shrubs to avoid the hottest hours of the day, while mammals like the kangaroo rat burrow underground.
2
当时山上气温降至零下17摄氏度，德纳姆按照格里尔斯在节目中教的那样，搭建小洞穴躲避风雪和酷寒。
As temperatures plunged on the mountainside to -17 Denham said he built a small cave to shelter from the freezing weather and the powder snow blowing across the mountain.
3
我们利用洞穴来作为可靠的储存地点，或者用于娱乐，又或者作为躲避自然或人为灾难的有效避难所。
We use caverns for stable storage, for entertainment, and for an effective shelter from natural and man-made disasters.
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