a Bachelor of Science的用法和样例：
- He got a Bachelor of Science in Engineering.
- I'm both a Bachelor of Science and a Master of Engineering.
- Rita: I thought you were after a Bachelor of Science degree. What's your major?
- He holds a Bachelor of Science in Computer Science from the University of Toronto, Canada.
- I graduated from Wuhan Polytechnics University with a bachelor of Science in mechanical Engineering two years ago.