如何降低空气质量差带来的风险 Air quality differs from place to place and day to day.

什么是极地涡旋天气系统？ Weather experts say extreme cold in many parts of the United States this winter has been driven by a polar vortex.

航天机构报告称2032年小行星撞击地球的风险增加 Scientists say the threat of a large space rock striking the Earth in 2032 has increased.

帝国大厦：曾经的世界最高建筑 The Empire State Building remains a popular place to visit in New York City.

费城：一座以历史闻名的城市 Philadelphia, also sometimes called Philly, is a big city on the Delaware River in the northeastern state of Pennsylvania.

法国在核聚变探索中创下新纪录 French scientists have announced they set a new record of 22 minutes for keeping hydrogen atoms in a state called plasma.

园丁们可以尝试的新开花植物 If you are a gardener, you probably have some favorite plants that you grow year after year.

园丁可尝试的新水果和蔬菜 If you are a gardener, you probably have some favorite plants that you grow year after year.

狂欢节：新奥尔良最大的派对 Wild celebrations of Mardi Gras come just before the start of Lent.

科学家发现基因与人类语言能力有关 A new study suggests the beginnings of human speech are linked to genetics.