单词:tandem-wheeled spreader
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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. On its opening day, 90,000 tourists traipsed across the London Millennium Bridge. That pitter patter of pedestrian feet caused the structure to visibly r
Rare but Deadly By Susan Brink /2005, U.S. News World Report . All rights reserved with permission. Distributed by Tribune Media Services International. Simple, cheap blood tests could save thousands
Ada's First Bike Ride 艾达第一次骑自行车 For most people, riding a bike is not much of an adventure. Most of us learn to ride by the time we are five years old and after that it's as easy as walking. But Ada had never learned to ride a bike.
Robot Security Could Help Cut Crime 机器人保安有助于降低犯罪率 Shopping centers, stadiums and universities may soon have a new tool to help fight crime. A California company called Knightscope says its robots can predict and prevent crim
Kawhi Leonard has now scored 30+points in four consecutive games. The last Spurs player to accomplish this feat? Tim Duncan in 2003-04. 卡哇伊莱昂纳德已经连续四场得到30分+的数据。上一位能够达成这一华丽数据的球员是谁
Did you really dump Jenny? Yes,but now I regret. I found I still love her. How does she feel? I'm not sure. But I know I broke her heart and she hates me. If we could start over I would treat her as well as I can and I will tell her how much I love h