The surface mark of an established plume is a hot spot—an isolated region of volcanoes and uplifted terrain located far from the edge of a surface plate.

一个已形成的烟羽的表面标志是一个热点——一个远离表面板块边缘的火山和隆起地形的孤立区域。

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We also put a mark at 0, the left edge.

我们还在 0 位置 —— 左侧边缘 —— 放置了一个标记。

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Fence posts mark what was once the edge of Lake Koroneia, now several metres from the shore.

湖边围栏的标志本来在Koroneia湖的湖边，现在距离湖岸却有好几米。

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And Hughes, 20, had a nightmare start, slashing at a short Steyn delivery off the fourth ball of the first over and only succeeding in getting a faint under-edge through to Mark Boucher.

BBC: Australia recover from poor start

Anderson's day did not begin auspiciously, however, as he dropped a regulation catch at slip to deny fellow England star Andrew Flintoff a fourth wicket when he found the edge of night-watchman Mark Davies's bat.

BBC: Anderson stars in Lancashire romp

Ken Doherty recovered from 2-1 down to edge Nigel Bond 3-2, while Mark Williams was sunk 3-0 by Stuart Bingham in the season's first major tournament.

BBC: SPORT | Other Sport... | Snooker | O'Sullivan beats Davis in opener