Is the word "medicine" always used in the singular?

What does "has-been" mean?

"Has-been" means a person who was famous, admired, important, or really good at something in the past, but is no longer this anymore. She calls the witch a "has-been" because she was once really good at performing magic, but she no longer is good at it. Ex: Lindsay Lohan used to be a popular actress, but is unfortunately now a has-been. Ex: He is a political has-been.

What does "bring in" mean?

To "bring in" means to introduce or to make something available for people. In this case, "bring in" refers to making electric cars become more accessible and widespread for everyone to use in the world. Here's a couple examples of the phrase "bring in" in this context: Ex: The store brings in new items every month to get more customers. Ex: The company is bringing in a few guest speakers to share their expertise with everyone.

What's "jury duty?"

"Jury duty" in the USA is the obligation to act as a jury member in court. So US citizens are called to serve as part of the jury, but they may not have to be a part of the jury after jury questioning or for another legitimate reason. The role of a jury member is to hear the evidence and be a part of giving a verdict. Ex: I have jury duty next week. Ex: I'm getting a medical letter to excuse myself from jury duty.

Please tell me the meaning of "you made the team".

"Made the team" is the past tense of "make the team". "Make the team" is used when someone has been selected to play on a sports team. Ex: I'm so excited! I finally made the baseball team. Ex: I guess I wasn't skilled enough to make the team this year. Ex: He was sure he would make the team.

What's "been meaning to" mean? Do people commonly say this?

Yes, it's a commonly used expression for when you want to say that you were planning to do something, but haven't done it yet (due to not having time or some other reason). In this video, the speaker jokes "I've been meaning to stack those chairs" to express that he was intending to stack the chairs, but not having done it yet (you can see that someone did it unintentionally for him, by throwing the chair). "Been meaning to X" is similar in meaning to "am/was planning on X." Ex: I've been meaning to visit the doctor, but I've been too busy lately. Ex: I've been meaning to sleep earlier at night, but I keep getting distracted by social media.