The explanation may be in Earth's mantle, the layer of rock underlying the tectonic plates and extending down over 1,800 miles to the outer edge of Earth's iron core.

解释可能是在地球的地幔中，这是在构造板块下面的岩石层，向下延伸超过1800英里到地球铁芯的外边缘。

youdao

I sat down at the water's edge.

我在水边坐了下来。

《牛津词典》

Trees and bushes grew down to the water's edge.

树和灌木丛一直向下长到了水边。

《柯林斯英汉双解大词典》

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

Hamilton, who recovered from 9-5 down to edge Michael Holt 10-9 in the final qualifying round of the world championship last week, compiled breaks of 92, 47, 68, 87 and 77.

BBC: White thanks fans after win

The blades are vibrated from side to side, as well as up and down (edge fatigue and flap fatigue) for millions of cycles, simulating twenty years of activity in the real world.

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