①. Digital preservation(数字保存)makes it possible to get back a photo or other important things online you accidentally deleted. | ②. After 3G and 4G, 5G is on the way. It's reported that 5G promises download speeds that are 10 to 20 times faster than what we have now. | ③. Built between 1163 and 1250, Notre Dame(巴黎圣母院)is one of the finest examples of French Gothic architecture(哥特式建筑)in the world. It is also home to many priceless works of art. However, it's a great pity that a fire broke its spire(尖顶)and a large part of its roof. |
④. Hanfu, the traditional clothing of Han Dynasty, has become more and more popular among Chinese young people in recent years. | ⑤. A car company in Korea worked out a new concept car(概念车)which has legs. The legs allow the car to climb over 1.5-meter-tall walls and step across gaps of the same length. | ⑥. The Forbidden City's name mentions the purple color because ancient Chinese astronomers(天文学家)believed that Polaris(北极星), the purple star, was in the center of heaven(天堂)and the heavenly emperor lived in it. |