Each of the four fundamental forces (gravity, electromagnetism, and the strong and weak nuclear forces) has a kind of theoretical knob that can be turned up or down to change its strength.

四种基本力(重力，电磁力，强作用力和弱作用力)都有一个理论把手，调节这东西可以改变力的强度。

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The emphasis of this project is to present threshold value of blasting vibration strength to ensure structure and apparatus of nuclear power station safe.

本项目重点在于提出确保核电站结构及设施安全的爆破振动强度的阈值。

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"The reductions in this treaty will not affect the strength of our nuclear triad, nor does this treaty limit plans to protect the U.S.and our allies by improving and deploying missile defense systems."

VOA: standard.2010.03.26

And just as we will always back up that commitment with the conventional and nuclear strength that is necessary to defend our allies, we are now backing up that commitment with new capabilities as well.

WHITEHOUSE: President Obama��s Statement at NATO Summit

However, one thing that has not changed is that the security of America continues to rest upon the strength of our nuclear deterrent.

CENTERFORSECURITYPOLICY: Center for Security Policy | Don��t Go There: President Bush Must Avoid Temptation to Make Unwise Cuts in U.S. Nuclear Deterrent Forces

The first wind farm, with five floating turbines, will be completed by 2017 and a larger 500 megawatt farm (half the strength of a nuclear power plant) by 2020.

FORBES: Frack That! The Innovators in Maine Have Plans to Power the Entire State with Offshore Wind