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。
quantum field theories for the strong nuclear force and the weak nuclear force have been developed.
适合强核力和弱核力的量子场论一直发展。
by calling them 「weakly interacting」, physicists mean that the particles experience another of the four fundamental forces, namely, the weak nuclear force that is responsible for radioactive decay.
之所以称其为「弱作用」,是为了指出粒子受到四大基本力中的另一种——由放射性衰变所产生的弱核力(四大基本力是:引力、电磁力、强力、弱力)。