식물성 단백질 섭취
The average American eats a lot of red meat, such as beef and meat from other mammals. Meat-eaters often note that red meat has a lot of protein, which helps repair muscles and build bones.

자연분해 타이어
Researchers say they have created a new synthetic rubber that could be used to make biodegradable tires.

뉴욕 그랜드 센트럴 터미널
The huge building has not changed much since it opened in February, 1913. About 750,000 people pass through Grand Central every day. Some just come to look at it, others to visit the stores. But most are there to catch the trains that enter and leave from the station.

평면 모니터
Consider the rapidly changing world of electronics. You can buy a giant television set, no thicker than a framed oil painting, and hang it on your wall.

공부에 지장이 있을 텐데
What are you doing right now? I’m watching a movie and it’s so good! I can’t stop watching it.

머리글자
Americans often try to say things as quickly as possible. So, for some expressions, we use the first letters of the words instead of saying each word.

이 닦기와 심장
Cleaning your teeth often, every day, is linked to a lower risk for heart problems.

미세먼지와 마스크
With all this pollution in the air, many people try to protect themselves and reduce their exposure. So, some people use face masks.

카카오와 초콜릿
Humans may have been enjoying cacao, the substance used to make chocolate, for much longer than experts had thought.

괜찮다면
If you don’t mind, can you do me a favor? I don’t mind. What is it?

어떤 지하철 노선을 타야 되나요?
Excuse me, sir. I’m trying to go to the White House. Which subway line should I take? 실례합니다. 지금 제가 백악관을 가려고 하는데요, 어떤 지하철 노선을 타야 되나요?

아직 위기에서 벗어나지 못했어
Hey Jason, what’s the score for the basketball game? Well, the home team is still losing by 15 points.

위험한 셀프카메라
"Selfie," taking a picture of yourself to post on social media, became an official word in the Oxford dictionary in 2013.

커피의 좋은 점
Scientists are finding that coffee does more than help you stay awake. Researchers in the American state of Pennsylvania say coffee has high levels of antioxidants.

데드라인
On the last Monday in May, people in the United States celebrate Memorial Day. This federal holiday honors members of the American military who died in war.

정신 건강을 위한 음식
When you eat the right foods, you feel better physically. But what you eat can also make you feel better emotionally and mentally.

카우보이
Experts say that men came from all over the United States to work as cowboys in the West. Cowboys were excellent horse riders. They trained wild horses. They used rope to catch and tie runaway animals.

실리콘 밸리의 힘
Much of its wealth and dynamism is centered in Silicon Valley which, during the Internet technology boom of the 1990s, spawned more than 29,000 high-tech firms.

자전거로 출근하기
More Americans than ever are riding their bicycles to work instead of driving. They are doing this because of gas prices, a slowing economy and concerns about the environment.

전원 관광
Smithfield Farm raises pigs, sheep, goats, and chickens. The animals are one of the main reasons tourists like Nancy and Michael McNiff come from nearby Washington, D.C. to spend a weekend.