1·This paper presents the producing cause of different unfavourable flow conditions in the outlet area of approach channel for ship gate and its perniciousness.
阐述了水利枢纽船闸引航道口门区各种不利流态产生的原因，及其危害性，和提出了改善的措施。
2·The act of refusing to pay the social insurance has serious perniciousness and illegality. The administrative penalty is insufficient to keep it from growing and spreading.
拒不缴纳社会保险费的行为，具有严重的社会危害性和违法性，采用行政处罚不足以遏制其滋生蔓延。