The propagation characteristic of acoustic wave in borehole that penetrates compact carbonate formation is analysed by doing model experiment.

本文用模型实验研究了声波在致密碳酸盐岩地层井中的传播特性。

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In doing so, they lost track of the most essential characteristic of a large-scale energy storage system: it must be cheap.

FORBES: Storage, Not Generation, is the Challenge to Renewable Energy

But Sir Robin started the huge housing estates that are a characteristic of Hong Kong, providing the newcomers with decent accommodation, and in doing so giving them jobs on the building sites and making money for the developers.

ECONOMIST: Sir Robin Black