Controlling roof accidents and preventing the occurrence of bursting underground pressure are the priorities and difficulties to mine deeper isolated pillar face.

控制顶板事故，防范冲击矿压的发生是开采埋深较大的孤岛煤柱工作面的重点和难点。

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At the Cathedral of the Holy Cross in South Boston, photographs of the three people killed in the attack and a Massachusetts Institute of Technology police officer slain Thursday were displayed on the altar, each face illuminated by a glowing white pillar candle.

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In the square a fifty something woman whose face is weather beaten into manly lines, crouches down by a pillar.

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We are bonded, and I truly believe that in the face of utter horror, wherever it might occur, we have a strong pillar in this emotional connection we feel as equal human beings and not in our narrow identities prescribed by nationality or religion or race or gender.

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