双: two; twin; both; dual阻力: obstruction; resistance理论: theory阻力理论: drag theory兴波阻力理论: wave-making resistance theory场力理论: force-field theory超引力理论: supergravitytheories动力理论: dynacical theory; kinetic theory核力理论: theory of nuclear forces能力理论: ability of faculty theory生产力理论: theory of productive forces水动力理论: hydrodynamic theory土压力理论: earth-pressure theory应力理论: stress theory智力理论: theories of intelligence重力理论: theory of gravity主应力理论: principal stress theory潮汐动力理论: dynamic theory of tide共扼应力理论: theory of conjugate stress牛顿引力理论: Newton's theory of gravitation疲劳应力理论: fatigue stress theory平面应力理论: theory of plane stress; theory plane stress双束动力理论: two-beam dynamical theory汤川核力理论: yukawa theory of nuclear forces; yukawa theory of the nuclear force万有引力理论: newton’s theory of gravitation
