"Without reservation" means without holding back. If you do something without reservation(s), you are fully involved in it and have no doubts about it. In the context of your example, it could also mean that these states have ratified the convention fully, i.e. that they have accepted all of the convention's rules and guidelines.

"Speak to/with" is more polite and formal, so you would probably want to use that in your example. Other than that, "talk to" and "talk with" are mostly interchangeable. The common explanation is that "talk to" puts emphasis on the action and "talk with" implies an extended conversation, but this is not always right and is not a real rule. You can make a case for using either in most situations.

"You reap what you sow" comes to mind as a decent analog.

Mislaid has the long "a" sound in words like may, pay, say. Misled has a short "e" sound, like in bed, pet, or said. (Yes, English is silly.)

Up is the direction where the visual elements go and "off the top of the screen" means that they're not on the screen anymore, they went "up" and off the screen. :)

"Remember" means to access a memory of something or to have a memory of something: - Do you remember where we went last year? - Yes, to New Zealand. I remember my youth./I remember the 60s./I remember what New York was like in the summer of '72. "Memorize" means to commit something to memory, to make a new memory: Memorize these formulas. You will need to use them in the test. But like I said, you can also use "remember" in this way in more relaxed contexts. For example, you're standing on top of the Eiffel Tower with your boyfriend or girlfriend. You would say: "Let's remember this moment!" It's the same meaning as "memorize", but "memorize" would almost be wrong here because it would sound too formal. "Reminisce" means to actively remember. This is the difference: I remember my youth. VS I'm reminiscing about my youth. The first one is just you stating the fact that you have a memory of or memories from your youth. You're not accessing them right now, you're just saying they exist. The second one, however, is you saying that you're accessing these memories right now. That's also why you couldn't really say: I reminisce about my youth. You could, but that would mean that you do it regularly, that is, that you regularly take the time to actively remember things from your youth. I hope that helped clarify it a bit. :)

To be honest, the difference is not terribly clear. I could give you the definitions now, but it wouldn't help much. Think of it this way: a fixed expression is something that you just say without thinking about what the words making it up mean together. For example, when you say "all of a sudden", all you've really said is "suddenly". It doesn't mean anything more or anything less, it's just a fixed expression in the language that you use that way. A collocation is the same in that it means more than its constituent words would imply, but it's not as "fixed" - it's just very commonly used. For example, collocations for the word "tunnel" would be "wind tunnel" and "carpal tunnel". The first is a specific construct within aerodynamics, not -just- any tunnel through which wind passes. The second is a syndrome (an illness, let's say), and not -just- a tunnel through the wrist (the New Latin for the bones of the wrist being "carpus"), as you might suspect from just looking at the words. I hope any of that helps. :)

The first word is probably "gubbins", meaning stuff. The man is saying that all the stuff from inside has come out. The second one sounds like "neanderthal", but I'm not sure why he would use that. :)