Experience has shown that bad practices, once established, are difficult to shed.
经验表明不当的实践，一旦确立，是难以摆脱的。
This tool was established by the people in long-term social and historical life practices.
这个工具又是人们在长期的社会历史生活实践中约定俗成的。
This tool was established by the people in long-term social and historical life practices.
这个工具又是人们在长期的社会历史生活实践中约定俗成的。
应用推荐