Another problem with contemporary fuel cells is the storage of the fuel.
另一个问题是当代燃料电池的存储的燃料。
Mind-body problem is a hot and difficult problem in contemporary western philosophy of mind.
心身问题在心灵哲学中一直是一个热点同时也是难点问题。
Popular art is a difficult problem left by contemporary aesthetic culture.
大众艺术是当代审美文化留下的一道难题。
Popular art is a difficult problem left by contemporary aesthetic culture.
大众艺术是当代审美文化留下的一道难题。
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