Compared with the other three forces in the universe (electromagnetism, the weak nuclear force and the strong nuclear force), gravity is relatively feeble, making gravitational waves hard to detect.

和宇宙中的其他三种力(电磁力、弱核力、强核力)相比，重力就微弱得多了，所以引力波很难被观测。

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The linchpin of the model is the underlying unity of two of the three forces: electromagnetism and the weak nuclear force.

ECONOMIST: Particle physics makes sense, but it assumes too much

Instead, they interact through its feebler cousin, the weak nuclear force.

ECONOMIST: Particle physics makes sense, but it assumes too much

The Standard Model (see table) includes familiar particles such as electrons and photons, and esoteric ones like the W and Z bosons, which carry something called the weak nuclear force.

ECONOMIST: The Higgs boson