global class field theory

例句：

1. 1.The global economy is closely linked to the world trade system.
   全球经济与世界贸易体系紧密相连。
2. 2. Global warming is a major threat to the planet's ecosystems.
   全球变暖是地球生态系统面临的主要威胁。
3. 3.The company operates globally, with offices in many countries.
   该公司在全球范围内运营，在许多国家设有办事处。
4. 1. Students are divided into different classes according to their age.
   学生根据年龄被分为不同的班级。
5. 2. The teacher explained the class objectives and expectations.
   老师解释了课程目标和期望。
6. 3. Different classes have different teaching methods.
   不同班级有不同的教学方法。
7. 1.The scientist works in various fields of research.
   这位科学家在多个研究领域工作。
8. 2. The field of physics is vast and complex.
   物理学领域广阔且复杂。
9. 3. She specializes in the field of environmental science.
   她专门研究环境科学领域。