Nordic Countries Built so Much Renewable Energy They Literally Have to Pay People to Use It
北欧电网很好地解决了电力短缺问题，以至于引发了一场令人着迷的供应过剩危机。
Can AI actually solve real math proofs? Researchers put it to the test
一项新的挑战揭示了人工智能如何能够很好地解决真正的数学问题
