The wind does not blow constantly, of course, so we will need to develop better ways of storing the energy we generate with it.

当然，风不是一成不变的，因此我们需要改进技术来储存利用风能获得的能量。

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Renewable sources of energy such as wind and solar power are intermittent. The wind doesn't always blow; the sun doesn't always shine.

再生能源是间歇性的，比如风能、太阳能：没有常刮的风，也不会总是阳光灿烂。

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Charpy impact test (V gap) : the specified height of pendulum of the one-time blow to V notched specimens in beam state, test specimen is broken by the impact absorbing energy.

夏比(V型缺口)冲击试验：用规定高度的摆锤对处于简支梁状态的V型缺口试样进行一次性打击，测量试样折断时冲击吸收功的试验。

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The energy industry needs to avoid "the same kind of body blow that just hit the financial industry, " billionaire Richard Branson warned Wednesday.

FORBES: Magazine Article

The collapse of Communism dealt Moscow's nuclear energy industry a big blow.

NPR: Russia Plans Nuclear Power Expansion

Nor does the wind blow (a likely source of some of their bought in energy) all of the time.

FORBES: Apple Wrongfoots Greenpeace over Renewable Power for the iCloud