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The plastic deformation mechanisms,such as diffusion and dislocation motion and nuclea-tion,dominate the plasticity of solids.However,they are usually infrequent events at ambient temperature which are far inaccessible to the normal molecular dynamics time window,and therefore exclude a direct atomic-scale observation of such important mechanisms in solids.Here we conquer the timescale issues of simulating rare events in solids via state-of-the-art well-tem-pered metadynamics,and adaptive boost (AB) molecular dynamics.