The first of its kind, this is the self-propelled suitcase that automatically provides power assistance when you encounter inclines or are straining to roll the suitcase.

这是一款首创的自助式行李箱，它能够在你拉它上坡或者感到吃力时助你一臂之力。

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India's power industry has been straining to keep up with the country's recent economic growth, and the expansion of power generation capacity has become a top priority.

印度的电力工业一直吃紧，已跟不上国家近期的经济增长，扩大发电能力已成为当务之急。

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But greater Dhaka has become one of the world's most populous and fastest-growing megacities, driving up the price of land and straining the country's electrical, power and gas systems.

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