人们可能会认为，在一年中的大部分时间里气温都这么低的情况下，冰层会又厚又硬。

People might think that with such low temperatures for most of the year, the ice would be thick and hard.

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尽管土拨鼠一年中的大部分时间都在冬眠，根据这个案例研究，它们仍然被认为是动物行为研究的优秀对象。

Even though they spend the significant portion of the year hibernating, according to this case study, marmots are still considered excellent subjects for animal behavioral studies.

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湿地是指多沼泽的区域，软而湿的陆地，一年中的大部分时间有水覆盖着土壤、或是有水存在于土壤表面或接近土壤表面的地方。

Wetlands are areas of marshy, swampy land, areas where water covers the soil, or is present either at or near the surface of the soil for a large part of the year.

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