A face can be rigid with concentration.Logical formLearned from5 sentences. A drill can be rigid.Logical formLearned from5 sentences. A description can be rigid.Logical formLearned from5 sentences. A .. can be rigid.Logical formLearned from5 sentences. A world can be rigid.Logical formLearned from5 sentences. Poles can be rigid.Logical formLearned from5 sentences. Expressions can be rigid.Logical formLearned from5 sentences. Tubes can be rigid.Logical formLearned from5 sentences. A contract can be rigid.Logical formLearned from5 sentences. Timing can be rigid.Logical formLearned from5 sentences. Air can be rigid.Logical formLearned from5 sentences. (Mesh panels) can be rigid.Logical formLearned from5 sentences. A shank can be rigid.Logical formLearned from5 sentences. (Hair shafts) can be rigid.Logical formLearned from5 sentences. A renminbi can be rigid.Logical formLearned from5 sentences.