答：
1. There is a group of students who adore science.
2. These students have average grades.
3. Sodium is a highly reactive chemical substance.
4. These papers ignite when in contact with water.
5. These bottles explode when in contact with fire.
英语翻译1.那里有一群热爱科学的学生2.这些学生成绩平平3.钠的化学性质活泼4.这些纸遇水则燃.5.这些瓶子遇火则爆.