As the cone spreads across the landscape along the flight path, they create a continuous sonic boom along the full width of the cone's base.

这个圆锥体沿着飞行路线在地面上扫过，底部与地面接触部分产生连续的轰隆声。

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Russia's boom has a more fragile base: the rising price of oil and gas.

俄罗斯的繁荣则建立在一个相对脆弱的基础上：石油与天然气价格的上涨。

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To begin, you will need five basic items: board, sail, mast, boom (2) and mast base.

开始的时候你需要最基本的五样东西：滑板、风帆、面罩、帆下桁和桅杆基座。

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One thing, he didn't say boom, boom, boom, boom, boom, boom, boom, boom, boom, boom with a base drum.

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Upside risks to our view could come from another infrastructure boom (not our base case).

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The easy answer is that, after years of under-investment by producers, particularly during the technology boom of the 1990s when most investors considered base metals dirt, the world has finally woken up to the fact that there are not enough raw materials to go round.

ECONOMIST: The magnetism of metals