What could be the cause of this strange invisible dividing line that skims across south-west France, cuts through Italy close to Florence, and continues eastwards through the middle of the Black Sea?

是什么原因导致这条奇怪的无形分界线跨越法国西南部，穿过意大利、接近佛罗伦萨，又继续向东穿过黑海中部？

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Evelyn Lund, 52, went missing from the farmhouse she shared with her husband in the remote village of Rayssac, south-west France, on 29 December 1999.

伊芙琳·隆德（Evelyn Lund），52岁，和丈夫一起住在法国西南部的一个名为瑞塞克（Rayssac）的偏僻小村庄里。 1999年12月29日，她从小村的家中消失。

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Bayonne is in the South West corner of France right near the border with Spain.

巴约讷坐落在法国的西南角，紧靠法国与西班牙接壤的边界。

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Sunday's finale was played out in torrential rain in south-west France and Dibowski's clear round piled the pressure on Fox-Pitt.

BBC: William Fox-Pitt clinches HSBC FEI Classics title

This week, with European Union approval, France began vaccinating geese and ducks in the south-west.

ECONOMIST: France