1. No comment. 2. I'm not at liberty to say. (= I don't have permission to give the information) 3. Wait and see. (= you will discover the answer later) 4. Let me get back to you. (= I will give you the answer later) 5. I'm sorry, that's confidential. 6. I'm sorry, that's personal. 7. I'd rather not talk about it. 8. It's none of your business. 9. Mind your own business. 10. Why do you want to know? #8 and #9 are rather rude – telling the other person to stop inquiring about your life
Some microscopes may have mercury lamps. Mercury is a dangerous substance and it is important to follow your manual for microscope use closely. If there is a mercury lamp explosion, the lab often needs to be evacuated and sealed until the proper department can clean up the mess.