The most popular majors in the second bachelor's degree of science are introduced as follows:

1. Computer Science and Technology: With the rapid development of information technology, the employment prospects of computer science and technology majors are very broad. Graduates can work in various fields such as software development, network engineering, database management, artificial intelligence, data analysis and so on. The computer industry has a high demand and relatively high salaries.

2. Data Science and Big Data Technology: With the arrival of the big data era, the demand for data science and big data technology majors is gradually increasing. Graduates can engage in data analysis, data mining, artificial intelligence and other aspects of work in enterprises, research institutions, financial institutions and other fields. The employment prospects in this field are very broad, and the salary is relatively high.

3. Biological science and technology: the employment prospects of biological science and technology majors are also better. Graduates can work in biopharmaceuticals, bioengineering, biomedical research and other fields. With the rapid development of biotechnology and the increased attention to health and medical care, the employment opportunities in this field are gradually increasing.

4. Environmental Science and Engineering: With the increasing awareness of environmental protection and the growing prominence of environmental issues, the employment prospects of environmental science and engineering majors are also better. Graduates can work in the field of environmental monitoring, environmental planning, environmental protection engineering and other related work. Government departments, environmental protection agencies, engineering companies and other units of environmental science and engineering professionals in greater demand.

5. Physics, chemistry, mathematics and other basic science majors: although the employment threshold of basic science majors is relatively high, there are still some employment opportunities in scientific research institutions, colleges and universities, large enterprises and other fields. Graduates can engage in scientific research, education, technology development and other aspects of the work.

It should be noted that the employment prospects depend not only on the specialty studied, but also on the comprehensive quality and ability of the individual. When choosing a specialty, in addition to employment prospects, you should also consider your own interests and abilities and choose a specialty that suits your development. At the same time, actively participate in internships, training, project experience and other activities to enhance their comprehensive ability and competitiveness, which is conducive to better employment.