为什么你选择了机械工程专业？
Why did you choose to major in mechanical engineering?
For example:
A: Why did you choose to major in mechanical engineering?
为什么你选择了机械工程专业？
B: Many factors led me to major in mechanical engineering.
许多因素导致我选择了机械工程这个专业。

你为什么认为你适合这份工作？
Why do you think you are qualified for this position?
For example:
A: Why do you think you are qualified for this position?
你为什么认为你适合这份工作？
B: I have a solid theory foundation and got a lot of practical experience.
我有坚实的理论基础。而且有丰富的实际经验。

关于机械工程，你最感兴趣的是什么？
I What are you primarily interested in about mechanical engineering?
For example:
A: What are you primarily interested in about mechanical engineering?
关于机械工程，你最感兴趣的是什么？ '
B: I like designing products, and one of my designs received an award.
我喜欢设计产品，我的一份设计作品还得过奖。

你现在的技术职称是什么？
What's your technical post title now?
For example:
A: What's your technical post title now?你现在的技术职称是什么？
B: I am a senior mechanical design engineer.
我现在是高级机械设计工程师。
technical post title 技术职称

你能简要介绍一项你的设计成果吗？
Can you briefly tell me about one of your designs?
Can you tell me concisely about one of your designs?
Can you tell me in short about one of your designs?
For example:
A: Can you briefly tell me about one of your designs?
你能简要介绍一项你的设计成果吗？
B: Of course, I designed a more powerful gasoline engine, which greatly increased the speed of limousines.
当然可以了。我曾经设计了一个功能非常强大的汽油发动机，它显著提高了轿车的速度。