俄语中有一类不变化的词表示突然、迅速完成的行为，意义与动词近似。试比较：她“啪”地拍了他一下。他在桌子上猛击一拳。在上面的句子中“”，“”这一类词利用其特有的形式，复制出与该动作相近似的声响，这类词具有鲜明的表情性，这样，它们又与感叹词近似。所以这些词是 There is a class of invariant words in Russian that indicates sudden and prompt acts, meanings, and verb approximations. To compare: she patted him. He punched a punch on the table. In the above sentence, the words “” and “” use their unique form to reproduce the sound similar to the motion. The words are vividly expressed, so that they are similar to the interjection. So these words are