The crew attaches new lengths of pipe one by one from the top until the "drill string" is long enough to hit the seafloor.

船员们从这根钢管的顶部，一根一根地装上更多管道，直到这根“钻柱”足够长，能碰到海底。

youdao

The crew attaches new lengths of pipe one by one from the top until the “drill string” is long enough to hit the seafloor.

船员们从这根钢管的顶部，一根一根地装上更多管道，直到这根“钻柱”足够长，能碰到海底。

youdao

Assemble drill to break through the first layer of crust, the crew deploys a steel pipe with an 11-inch-wide drill bit at the bottom.

为了突破第一层地壳，船员们使用底部装有11英寸宽的钻头的钢管。

youdao

At 10:30 a.m. a drill consisting of lowering a lifeboat with crew members aboard began.

WSJ: Cruise Ship Lifeboat Accident Kills Five in Spain

The 4, 200 passengers and crew on board had not conducted an emergency drill after leaving on its cruise several hours earlier.

BBC: Costa Concordia cruise ship captain 'went off course'