The Dodger slid out of his coat in one smooth movement, leaving Fagin holding only the empty coat.

神偷以一个非常娴熟的动作从衣服里滑了出来，使费金手里只攥着一件空衣服。

Mr Slepian knew from previous studies by other people that anxiety has a tendency to disrupt smooth body movements, and he suspected this might be the explanation.

斯莱皮恩从前人的研究中了解到，焦虑具有扰乱身体动作流畅度的倾向，他猜想这或许能够解释原因。