contact length between the tool and chip

例句：

1. 1.The two countries have a long history of cultural exchanges and contacts.
   这两个国家有着悠久的文化交流和联系。
2. 2. The research team has established a good contact with the local community.
   研究团队与当地社区建立了良好的联系。
3. 3.The new policy aims to improve the contact between the government and the public.
   新政策旨在改善政府与公众的联系。