宫城、福岛以及岩守县和北部地区承担了地震来临时的最初的损失，以及随之而来的海啸席卷。
Miyagi, Fukushima and Iwate prefectures further north bore the brunt of the damage from the shock and the ensuing tsunami.
根据能量守衡原理和钻头破岩机理，建立了地层岩性与钻头工况评估模型。
According to the conservation principle of energy and the rock-breaking mechanism of bit, the assessment model was set up for formation lithology and the working condition of bit.
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