Examine walls, floor, doors, staircases, and windows to make sure that the building is not in danger of collapsing.

仔细检查墙壁，地板，门，楼梯，和窗户，以确保他们不会坠落碎片，或者倒塌。

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To prevent the cervical vertebrae from collapsing into one another, firmly press the forearms and wrists into the floor.

为了防止颈椎承受过大挤压，小臂和手腕要用力撑起来。

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They joined the line of people in the fire escape and when they reached the15th floor heard the noise of the south tower collapsing .

他们立刻加入沿火警紧急出口撤离的人流，在到达第15层时，他们听到南塔倒塌的隆隆声。

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Jeremy Bush frantically tried to rescue his brother by standing in the hole and shoveling away rubble until police arrived and pulled him out, saying the floor was still collapsing.

CNN: Home of Florida man devoured by sinkhole to be demolished

Bush frantically tried to rescue his brother, by standing in the hole and digging at the rubble with a shovel until police arrived and pulled him out, saying the floor was still collapsing.

CNN: Florida calls off search for man swallowed by sinkhole

Bush frantically tried to rescue his brother, Jeff Bush, by standing in the hole and digging at the rubble with a shovel until police arrived and pulled him out, saying the floor was still collapsing.

CNN: A loud crash, then nothing: Sinkhole swallows Florida man