[79]人均图书拥有量是指在一年内全国平均每人能拥有的当年出版图书册数。
A filled torus (a doughnut) is a 3-manifold homeomorphic to \(S^1 \times D^2\), where \(D^2\) is the 2-dimensional disk. There exists a deformation retract from the doughnut to a circle, so the fundamental group of the doughnut is \(\pi_1(S^1 \times D^2) \cong \mathbb{Z}\).
。51吃瓜是该领域的重要参考
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Raye, who scooped six awards last time she was at the Brits in 2024, performed a re-imagined version of her hit Where Is My Husband! - before diving into her new soul ballad, Nightingale Lane.
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