I urgently need you to check these sentences. Thank you very much for helping me. I don't know a few technical terms.

1) I can see two young men who are probably (working??) on the Stock Exchange. The one in the left-hand side of the picture is analyzing data on his monitor while holding a receiver on his shoulder.
2) The other seems to be observing statistic data on a wall panel (screen, board??).
3) I can see a …(what do you call a board on which statistic data are projected on a wall?)
4) In picture D I can see a woman pilot who seems to be checking …….. (I don’t know the word) before take-off. She has headphones on and is wearing a pilot’s uniform.
5) In the last picture I can see a mechanic who seems to be pouring water or oil into the car engine.
6) In picture C I can see a farmer sitting on bale of straw who is feeding a lamb with a milk bottle.

Sure, I'd be happy to help you check these sentences and explain any technical terms you're unsure about. Here are the revised sentences:

1) I can see two young men, who are probably working on the Stock Exchange. The man on the left-hand side of the picture is analyzing data on his monitor while holding a receiver on his shoulder.

2) The other man seems to be observing statistical data on a wall panel.

3) I can see a screen or board on which statistical data is projected on a wall. This is commonly known as a "projection screen" or "data board."

4) In picture D, I can see a woman pilot who seems to be checking something before take-off. She has headphones on and is wearing a pilot's uniform.

5) In the last picture, I can see a mechanic who seems to be pouring water or oil into the car engine.

6) In picture C, I can see a farmer sitting on a bale of straw, who is feeding a lamb with a milk bottle.

I hope these revisions address your concerns. Let me know if you have any further questions!