Computer simulations of this impact show that both of the objects would melt in the impact and the dense core of the impactor would fall as molten rock into the liquefied iron core of Earth.

对这次撞击的计算机模拟显示，这两个物体都会在撞击中熔化，而撞击者稠密的核心会以熔融岩石的形式落入地球的液化铁芯中。

youdao

A massive rock fall trapped the men as they operated a tunnelling machine.

那些男人在驾驶隧道掘进机时，一次大面积的岩崩困住了他们。

《柯林斯英汉双解大词典》

Afraid that in her unclear state of mind she might fall off the rock to her death, Grant climbed on all fours up a tight, narrow path by digging into the earth with his fingers and feet until he reached Paula.

担心她在神志不清的状态下会从岩石上掉下来摔死，格兰特手脚插入泥土，四肢并用地沿着一条狭窄的小路往上爬，一直爬到宝拉身边。

youdao

Walls of rock fall away sharply at your feet.

VOA: special.2009.10.07

"The first time we visited this rock last fall - there were maybe one or two children out of 15 who knew how to climb up this."

VOA: standard.2010.06.25

The Fall plays rock at the primary level, before anything has been added.

NEWYORKER: Plug and Play

It follows a major rock fall at the quarry in April 2012 that saw half a million tonnes of rock cover the quarry floor and hamper operations at the site.

BBC: Penrhyn Quarry wins Welsh government loan help

The authority also reported rock fall on slopes below the bridge north of Blacknor.

BBC: Swanage landslip