It’s an unusual idea— every year a 5,500 square meter hotel is temporarily ‘borrowed’ from Sweden’s River Torne and come spring, the rooms and suites are returned to the river to be washed out to sea.
这是一个不同寻常的创意——每年都有一个5500㎡的旅馆从瑞典的Torne河被临时“借来”迎接春天。这些套房还会回到河里,再被冲进海中。
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应该是“当春天来临时,....”come spring在这里=when spring comes
The temporal Swedish ICEHOTEL is a complex built from ice, with a different design every year. 这个临时的瑞典冰旅馆是用冰建造的复杂建筑,
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complex是综合建筑的意思,不是复杂的名词形式。
Each winter it hosts guests and houses a collection of bespoke ice-art, created by selected artists from around the globe.
每年冬天在房间里都放置一些定制的冰雪艺术品,这些是由全球被选定的艺术家们创作的。
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selected 这里应该翻译成“精选的”