bring up (a topic)

This means to introduce a topic into the conversation, or to start talking about a topic.

When you use "that", "it", "her" or other pronoun, the order is "bring ___ up". When you use a noun or longer phrase, use the order "bring up ___"

I'm glad you brought that up.

I don't know why she had to bring up the fact that we used to go out in front of all those people.

guys

In English, there's not a really good word for addressing a group of people. If you're talking to one person you say "you":

How are you?

But there's some disagreement about what to say to a group of people. English speakers use different expressions depending on the region and dialect, but one common expression is "guys". For example, at a restaurant with a large group of friends you can say:

Hey guys, are you ready to order?

"Guys" technically means a group of men, but it's usually OK to use it for mixed groups of men and women, or even for groups of all women.

In very formal situations, avoid calling a group of people "guys". Instead, use a phrase like "everyone":

Everyone, thank you for coming.

a good point

When there's a debate or discussion going on, a "good point" is an idea which is convincing and makes sense.

For example:

A: I think we should take Highway 75.

B: But I bet there's a lot of traffic right now.

A: That's a good point.

You can also just say "Good point" when someone says something convincing:

A: There's no way we'll be able to finish in time to make it to the opening.

B: Good point.

earlier

You can talk about something that a person said using the phrase "earlier":

Earlier you spoke about the environmental effects of industrial farming. Can you speak a little more on that?

This phrase sounds a bit formal. It's perfect for meetings, asking questions after a speech or presentation, or interviews.