is a digital twin?1. What is a digital twin?2. What can the “digital twin” system do for us?2. What can the “digital twin” system do for us?3. What is a “smart stone”?3. What is a “smart stone”?4. What ……

spending nearly two decades and some US$75 billion searching for the perfect antimissile system... a limited system vary widely, from an economical US$80 billion to as much as US$300 billion.The Bush ……

It seems that humankind’s passion (热情) for exploring space is reaching new heights. US space agency... to cooperate (合作) on building a station on the lunar orbit, called “deep space gateway”. The news ……

green cards doled out via a points system打分制绿卡发放制度By 2017, US permanent residency permits, known as green cards, could be doled out through a points system, AFP cited a US *immigration reform bill ……

the new five-storey building, cutting the ribbon on what officials hope will come to symbolize Tokyo... yen (US$333.5 million) building opens for use on April 30, it has sparked controversy over whether ……

to guide us.A satnav system uses groups of satellites to show the user’s location. They send information to a receiver, such as a smartphone, to show us where we are. The earliest built satnav system ……

国会有哪些大事发生呢？In the new year, China will see many exciting events. From finishing building... to see this year.In 2002, China first proposed (提出) the goal of building a moderately prosperous society ……

韦伯望远镜有多厉害？韦伯望远镜有多厉害？Well done, Webb! US James Webb Space Telescope (詹姆斯·韦伯太空望远镜) went... at (到达) its new home in space. It is 1.5 million (百万) kilometers away from Earth.   Well ……

to the moon since 2007.China plans to finish building the BeiDou Navigation Satellite (卫星导航) System... Mars mission. PHOTO BY NING HONG2020年中国航天事业会有哪些新突破？2020年中国航天事业会有哪些新突破？What will China do in the new ……

us.A satnav system uses groups of satellites to show the user’s location. They send information to a receiver, such as a smartphone, to show us where we are. The earliest built satnav system ……

on Tall Buildings and Urban Habitat in the US. It’s a big honor. The council says that the CCTV building shows us a new type of building design (设计). Height is not important here, but it has a truly 3-D ……

. The new Genzyme Corp building uses a natural lighting system.2. The Genzyme Centre formally opens... friendly corporate office building.(4) The lighting system uses blinds and reflective surfaces ……

世贸中心一号楼成纽约第一高楼。WHAT is the tallest building in New York City, US? The answer is One World Trade... will stand 541 meters tall. It will be the third-tallest building in the world. The tallest building ……

世界“最大生物”正在消失In the US, there is a group of aspen trees (白杨树). There are 47,000 trees. Now the giant... the new trees.The older trees are dying. But there are not any new trees. That’s why the big forest ……

for building a new electricity system. This plan identifies measures to be taken between 2024 and 2029...;On Aug 6, China issued an action plan for building a new electricity system. This plan identifies ……