We're starting today with a look at the situation in the Northeastern United States which was just hit by a relatively rare tropical storm. 今天我们首先关注美国东北部的情况，该地区刚刚遭受了一场相对罕见的热带风暴的袭...
Fleets of six-wheeled robots are appearing in some communities and carrying food with them. 六轮机器人车队出现在一些社区，它们被用来运送食物。 They can cost an estimated $5,500 each and somebody has to run them so they requir...
Which of these organisms has the most known species? 下列生物中，目前已知哪个物种最多？ Birds, spiders, grass or cockroaches? 鸟、蜘蛛、草还是蟑螂？ Scientists believe there are more than 45,000 species of spiders out ther...
A new theory suggests it might have been easy for a human to keep pace with a Tyrannosaurus Rex, like you could out walk it. 一项新理论认为，人类可能很容易跟上霸王龙的步伐，你可能走得比它们快。 Dutch paleontologists...
NASA's Apollo 8 mission was noteworthy for doing what? 美国国家航空航天局（简称NASA）的阿波罗8号任务因何引人注目？ Orbiting the Earth, orbiting the moon, the first space broadcast or a lunar module landing? 环绕地球、环...
Archeologists have discovered something extraordinary and maybe a little gruesome in an ancient cave on the west coast of Italy. 考古学家在意大利西海岸的一个古老洞穴中有非凡的发现，也许还有点可怕。 Among the bones of...
This year Memorial Day coincides with another historic date. 今年的阵亡将士纪念日恰逢另一个具历史意义的日子。 One of America's worst outbreaks of racial violence occurred on May 31st, 1921. It's known as the Tulsa Race Massacr...
Many Americans have a three-day weekend coming up. Since 1971, the Memorial Day Holiday has been observed on the last Monday in May. 许多美国人将迎来为期三天的周末。自1971年以来，阵亡将士纪念日假期一直被定为5月最后...
In a lunar eclipse, what is the term for the dark shadow the Earth throws over the moon? Umbra, tetrad, node or ombre. 在月食中，地球在月球上投下的阴影称为什么？本影，四分体，节点还是渐变色？ The umbra is the dark...
So that could become one way to do it. 用狗狗检测可能成为一种方法。 Another would be just about as fast but it would involve insects though it might take a microscope to get results. 另一种方法的速度也差不多，但会涉及昆虫...
