Đường cung trong kinh tế vi mô

70 năm giải phóng trại Auschwitz

Drone video shows the Auschwitz-Birkenau concentration camp (trại tập trung) as it is today – 70 years after it was liberated (giải phóng) by Soviet troops (quân đội). The camp in Poland is now maintained as a World Heritage Site and is visited by thousands of tourists and survivors every year.

Auschwitz was the largest camp established by the Germans during World War II. More than a million people – the vast majority of them Jews – died there between 1940, when it was built, and 1945, when it was liberated by the Soviet army.

To see the extended six minute version, click here.

Ngắm bầu trời tuyệt đẹp ở nước Mỹ

Photographer Shane Black and two friends spent two months travelling across the United States teaching photography workshops and exploring the great outdoors in an old Dodge Caravan. The trio travelled across 32 states, visited 13 national and state parks and drove nearly 13,000 miles, capturing jaw-dropping footage along the way.

The music is 'Signaling Through The Flames' by The American Dollar. Technical details below:

Motion Control System: Dynamic Perception Stage Zero Dolly, Vixen Polarie Star Tracker (used for slow panning)

Camera Gear: Canon 5DMKII, Canon 5DMKIII, Canon 24LII, Canon 16-35LII, Canon 70-200L ISII, Canon 85L, Nikon 14-24 f2.8, Lee Filters, Manfrotto Tripods

Processing: Adobe Lightroom 4, LRTimelapse, Adobe After Effects

Ngắm bầu trời sao lung linh, huyền ảo

In this stabilized time-lapse, the stars' position in the night sky is fixed so you can get a sense of our planet's movement through space. And now it's time for some mind-boggling (không thể tin được) figures:

– Earth rotates around its axis (at the Equator (đường Xích đạo)) at roughly 460 meters/second (503 yards/second)

– Earth orbits around our Sun at about 107,826 km/h (67,000 mph)

– Our solar system whirls around the center of the Milky Way galaxy roughly 788,579 km/h (490,000 mph)

You can read more about how fast Earth is moving in comparison to other objects at Scientific American.

Xem siêu cung thủ trổ tài bắn chẻ đôi mũi tên

Legolas who? Hawkeye what? Meet Lars Andersen, the man who wants to revive the ancient art of battle archery. Watch as he demonstrates his unorthodox technique while completing a wide array of extremely technical tricks and manoeuvres.

"A sight for sore eyes" nghĩa là gì?

Thật là đỡ nhức mắt. Photo courtesy micadew.

'A sight for sore eyes' có từ sore là đau, nhức nhối, cụm từ này nghĩa là người hay vật/điều gì khiến bạn rất vui lòng, thanh thản khi được nhìn thấy (a person or thing that you're extremely pleased or relieved to see).

Ví dụ

For most people, seeing gas prices drop down to less than $2 per gallon was a sight for sore eyes – and wallets – but for businesses in Houston, the effects of this dramatic drop may be more widespread than first realized.

Freshly cut grass and 70 degree weather was a sight for sore eyes for the Illinois men’s golf team. The team began its season this weekend with the Tinervin Cup, an event put on by Jeff and Madalyn Tinervin against Illinois State in Placida, Florida. The Illini won 8-1 and remain a perfect 12-0 in this event since its creation in 2003.

Camp for drivers to be a sight for sore eyes: Do your eyes glaze over or get watery while behind the wheel? Don't turn a blind eye to it. The police department has found that poor eyesight has led to a majority of accidents in the city. To nip this disconcerting trend in the bud, the department has now made it mandatory for drivers of autorickshaws, taxis, schoolbuses and police vehicles to undergo a thorough eye examination. It has tied up with Disha Super Specialty Eye Hospital in Hubballi for a camp that will be conducted till January 31. All minor eye care needs of the drivers will be taken care of by the hospital.

Phạm Hạnh

Bài trước: "Big heart" nghĩa là gì?

"Be like a bear with a sore head" nghĩa là gì?

"Turn a blind eye" nghĩa là gì?

"Nip sth in the bud" nghĩa là gì?

Hãy tự vận động

Praia de Copacabana, Rio de Janeiro , Brasil. Photo courtesy Digo_Souza.

Dân số thế giới hơn 7 tỷ người, Đức Phật và Chúa Trời hẳn rất bận rộn. Hãy tự vận động trong lúc chờ đến lượt mình được ban may mắn.

Bài trước: Didn't you realize?