Both the crossing girders and the core serve to stabilize the tower, an extra challenging task in a seismologically active area.

交叉梁和核心都服务用来稳定塔楼，使其成为在地震活跃地区的一个额外挑战。

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But then Mr Prahalad's core competence lay in big ideas rather than in dotting the "I" s and crossing the "t" s.

不过，普拉哈拉德的核心竞争力在于宏大思想，而不在于亲力亲为。

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