鉴于穴居人一般都居住在洞口附近，因此，拉斯科岩洞许多代穴居者隐藏他们的艺术作品，其中必定存在某些原因。

Since cave dwellers normally lived close to entrances, there must have been some reason why so many generations of Lascaux cave dwellers hid their art.

youdao

“下降的原因之一是20世纪80年代的经济形势。”苏塞克斯大学的亚历山大·莫拉迪说。

"One reason for these decreases in height is the economic situation in the 1980s," said Alexander Moradi of the University of Sussex.

youdao

在19世纪90年代，是什么原因使维多利亚人不愿意笑着拍照？

What might have kept the Victorians from smiling for pictures in the 1890s?

youdao