강요하다
Hey, I heard Justin was at the hip-hop concert last Friday. I thought he doesn’t like hip-hop music. Well, I twisted his arm and got him to go.

에스컬레이터
A: Let's take the metro, Brian. B: All right, mom. A: These escalators are very long and steep. Let me hold your hand. By the way, you're not supposed to run or sit on the escalators. A: I know, mom.

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.

지구
The world celebrates Earth Day every year on April 22. It is a day to think seriously about how our lifestyles and daily habits affect the earth.

재미있는 손씻기
One of the easiest ways to stop the spread of disease is to simply wash your hands. Twenty seconds of handwashing with soap and water can reduce illnesses and save lives.

팁은 얼마나 줘야 하나요?
That was a great dinner! Thank you for inviting me. Thank you for joining me. How much tip should we leave the waiter?

트랜스 지방
New York City wants to fight fat. The Board of Health has passed a ban on trans fats in all restaurants.

일식
There is one natural event that many people want to experience during their lifetime -- an eclipse!

초토화 정책
Scorch is also a verb. When we scorch something, we burn it. But scorch sounds more serious than a burn.

막다른 길
There were still big, central streets - often wide boulevards. But branching off were nodules called cul-de-sacs, or streets that dead-ended into little traffic circles.

아이슬랜드의 스웨터
There is trouble in one of Iceland's most special industries: the production of hand-knit "lopi" sweaters.

녹고 있는 북극 빙하
Arctic sea ice is melting faster than expected, and that means big changes in Earth’s climate system.

야외 음식 안전한가?
Disease-control officials estimate that about one in six Americans get sick from food each year. One hundred thirty thousand have to go to a hospital for food poisoning.

박사 학위
The highest degree that a student can earn is a doctorate. Some doctorates are professional degrees, as opposed to a degree based on research.

거칠게 장난치며 놀다
You look exhausted. Was babysitting your nephews that hard?

손을 더럽히다
Today, you might want to roll up your sleeves. We are going to get our hands dirty! Figuratively, that is.

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.”

메콩강
An intergovernmental organization says water levels in the Mekong River have dropped to “worrying levels.”

효과적인 영어 연습
English learners can improve their ability to use different words by practicing. One way to practice effectively is through repetition -- doing something over and over again.

정말이야?
I heard you’re buying Kathy a new car for her birthday. Are you for real? Yes, I’m for real.