对局部对称共形平坦黎曼流形中具有平坦法丛的极小子流形作了一些讨论,得到了极小子流形是全测地的两个充分条件。
This paper studies the Schouten tensor on the locally conformally flat manifold, and gets some sufficient conditions for m to be the space of constant curvature, which improves the known results.
日内瓦大学的卡米利费登兹博士和他的研究小组测量了49位男性的2d: 4d比例,然后将他们的图片随机地展示给女性被测者们。
Dr Camille Ferdenzi, of the University of Geneva, and his team measured the digit ratios (the 2d: 4d ratios) of 49 men, and then presented their pictures in random order to female participants.
从东到西,从西到东,旅人飞快地驶过茫茫大草原,驶向苍茫天际,穿过一望无际的玉米地;高不可测的苍穹,硕大的云朵,老是几乎平淡无奇、千篇一律。
From east and west, travelers dart across these prairies into the huge horizons and through cornfields that go on forever; giant skies, giant clouds, an eternal nearly featureless sameness.
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