1. In discussing whether we are alone, most SETI scientists adopt two ground rules. 在讨论我们是否孤独时，大多数 SETI 科学家会采用两条基本规则。
2. Once you have worthing opponents, set some ground rules so everyone understands responsibilities and boundaries. 一旦你有了值得尊敬的对手，就制定一些基本规则，让每个人清楚所要承担的责任和坚守的底线。
3. Her answer so surprised me that I decided to ask some of the other developers who were also parents what their domestic ground rules for screen time were. 她的回答让我很惊讶，于是我决定问问其他一些同样身为父母的开发商，问问他们国内电子设备使用时间的基本规则。
4. The panel says the ground rules for the current talks should be maintained. 该专门小组说应该坚持当前会谈的基本原则。
5. We have already succeeded in working out ground rules with the Department of Defense. 我们已和国防部成功地制定出了基本原则。
