Chandler: Pheebs, can you help me pick out an engagement ring for Monica? I can’t figure this out! It’s so hard! Should I get her a (turning to each page) Tiffany cut or a Princess cut or a — ah-ah! Paper cut!

Phoebe: Now, have you told anyone else?

Chandler: No, I don’t want to tell anybody else because I don’t want Monica to find out.

Phoebe: You told me.

Chandler: Well, it’s because I trust you, you’re one of my best friends, and you walked in on me when I was looking at ring brochures.

Phoebe: Yeah well, once again not knocking pays off.

 

Explanation:

pick   somebody/something ↔  out   phrasal verb – to choose someone or something from a group:
انتخاب کردن
She picked out a navy blue dress.

او یک لباس آبی ملوانی رو انتخاب کرد.

figure   somebody/something ↔  out   phrasal verb - to think about a problem or situation until you find the answer or understand what has happened  SYN  work out
حل کردن مسئله یا موضوع
Can you figure out how to do it?

میتونی بفهمی چطور باید اینو انجام داد.

find out   phrasal verb -  to get information, after trying to discover it or by chance
پی بردن به موضوعی
Has anyone found out how much all this is going to cost?

آیا کسی فهمیده که تمام این چقدر هزینه میبرده؟

walk in on  somebody   phrasal verb –   to go into a room and accidentally interrupt someone who is doing something private that they would not want you to see
رفتن به اتاق کسی و دیدن اون شخص در حالی که داره کاری رو میکنه که نمیخواد کسی بفهمه

Mom walked in on me when I was wrapping up her gift.

مامان وقتی داشتم هدیه شو تو اتاق کادو می کردم، وارد اتاق شد.