더운 날씨에는 날기 어려운 비행기
It is sometimes more difficult to get airplanes off the ground in extremely hot weather. But the problem is not the temperature itself or the humidity. It is the air density that can get in the way.

물부족 해결
Yet more than 700 million people worldwide have trouble getting clean, safe water. That number comes from the Water Project, a non-profit group.

호박등
You can find jack-o'-lanterns on the front steps of countless American homes on October 31, Halloween night.

고혈압
Recently, two leading heart organizations changed the definition of what it means to have high blood pressure.

디지털 교과서
Association spokesman Charles Schmidt says electronic textbooks now represent just two to three percent of sales. But he says that is expected to reach ten to fifteen percent by two thousand twelve.

친구가 가족보다 낫다?
American researchers now say friendship is more important than family. Their new study suggests that friends may be more important than family members, especially as we age.

내가 너라면 자랑할 텐데
Hey congratulations on winning 1st place in the swimming contest. Oh, you heard about it? Well, thank you.

배짱
In the medical world, guts are the internal organs of an animal. It's a person's stomach or the part of the body that contains the stomach.

뭐가 뭔지 모르겠어
I’m at sea over this computer user manual. I don’t know what I should do. How can a manual leave you so confused? It’s supposed to be easy to understand.

상황을 잘 파악하다
I’m gonna need help organizing all these packages coming in. If I don’t stay on top of it, I’m going to lose track of which packages came from who.

가격을 올리다
Jen: My friend, she doesn’t want to renew her apartment lease because the apartment management is bumping up the rent a lot!

평지풍파를 일으키다
You have probably seen a boat before. Watching one move through the water can be really fun.

다리 뻗을 공간이 충분치 않았어요
How was your flight? It was fine, but I was a little cramped. Where were you sitting on the plane? I was in an economy class seat. There was not enough legroom for me. I had no elbowroom, either.

꼼짝 못하고 집에만 있었어
Hey, are you feeling any better? Yes, much better. Mike: That’s good to hear. Then let me take you out for some fresh air and grab some lunch outdoors. I just feel like you’ve been stuck and cooped up at home all week from the cold.

겨울에 피는 꽃
In many colder northern countries, poinsettias are a sure sign that Christmas is near. Nearly all sales of this flowering plant come at wintertime.

양자 위성
China has launched the first satellite using quantum technology to send communications back to earth. Quantum technology will make these communications safe from hackers.

빠르게 성장하는 직업들
America’s extremely wealthy population is bigger than ever. And their money is supporting jobs for an increasing number of low-wage workers.

월드 베이스볼 클래식
Many of the best baseball players in the world are competing for their home countries this month in a new international baseball tournament. It is called The World Baseball Classic.

가상현실을 이용한 수술 준비
Felicia Luna had a really bad headache. She said the painful pressure felt “like someone was squeezing my head really tight.”

할 일이 산더미이다
Jen: You’re here with your friends and it seems like you have a really full plate on you today?