return urls, next_url
Mr Fingleton added: "Motorways wouldn't be very useful if we all drove at five miles (8km) an hour, but that's sort of what we're doing in nuclear safety."
。关于这个话题，新收录的资料提供了深入分析
Definition 4 (Definition: Fundamental Group) Let \(X\) be a topological space and \(x_0 \in X\) a basepoint. A loop based at \(x_0\) is a continuous map \(\gamma: [0,1] \to X\) with \(\gamma(0) = \gamma(1) = x_0\). Two loops \(\gamma, \delta\) are homotopic relative to \(x_0\) (written \(\gamma \simeq \delta\)) if there exists a continuous map \(H: [0,1] \times [0,1] \to X\) such that \[H(s,0) = \gamma(s), \quad H(s,1) = \delta(s), \quad H(0,t) = H(1,t) = x_0\] for all \(s,t \in [0,1]\). This is an equivalence relation; denote the equivalence class of \(\gamma\) by \([\gamma]\).
穆傑塔巴的名字首次受到廣泛關注，是在2005年的伊朗總統選舉中。該次選舉最終由強硬派民粹領袖馬哈茂德·艾哈邁迪-內賈德（Mahmoud Ahmadinejad）勝出。
，更多细节参见新收录的资料
经济增长既需要生产要素的积累，也要依托全要素生产率持续提高。提升全要素生产率，关键在于促进各类先进要素向发展新质生产力集聚。
Андрей Ставицкий (Редактор отдела «Наука и техника»)。新收录的资料是该领域的重要参考