四种基本力（万有引力、电磁力、强核力和弱核力）中的每一种都有一个理论上的旋钮。
Each of the four fundamental forces (gravity, electromagnetism, and the strong and weak nuclear forces) has a kind of theoretical knob.
然而，四种基本力中，引力是至今发现最弱的一个。而且直到2002年，引力的量子特性才被证明。
However, of the four fundamental forces, gravity is by far the weakest, and it took until 2002 before gravity's quantum nature was proven.
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。
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.
在劳伦斯伯克利国家实验室进行的一项补充研究中，科学家们没有考虑夸克的质量，而是去掉了我们宇宙中四种基本力中的一个。
In complementary research at Lawrence Berkeley National Laboratory, scientists didn't ponder the mass of quarks, but totally removed one of the four fundamental forces of our universe instead.
科学家们认为，万有引力、电磁力、弱力和强力是宇宙中的四种基本作用力。
Scientists believe that gravity, electromagnetic force, strong nuclear force and weak nuclear force are the Four Basic Forces of the universe.
科学家们认为，万有引力、电磁力、弱力和强力是宇宙中的四种基本作用力。
Scientists believe that gravity, electromagnetic force, strong nuclear force and weak nuclear force are the Four Basic Forces of the universe.
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