The machines have been sifting through the rubble from the school, crushing it to be moved out of the area.

许多机器一直从学校废址上的碎石上碾过，把他们压碎，以便能运出去。

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They hadn't found any skulls or skeletons yet, but he could see that they were sifting through the dust and large slabs of concrete towards the area where he knew they were situated.

他们还没有找到任何颅骨和骨骼，但是他能看见他们正从灰尘和大片灰尘和大片水泥中仔细扒着往前找，他知道他们就在那里。

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In a small lab in the San Francisco Bay Area biotech hub of Emeryville, scientists at a startup called Halotechnics are sifting through thousands of mixtures of molten salt.

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