单词:manta rays
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Health Report - Mouth X-Rays and the Brain; Infected Gums Do Not Cause Heart Attacks This is the VOA Special English Health Report. A new study suggests that dental X-rays may increase the risk of the most common kind of brain tumor. However, experts
《竞速灭绝》为《血色海湾》导演最新纪录片,科学家预测本世纪末将会有一半以上的物种从此消失,更进一步指出我们已经来到地球史上第六次大灭绝时刻,而人类正是引发第六次灭绝的因
AS IT IS 2016-04-20 Ecuadors President: Earthquake Recovery to Cost Billions of Dollars 厄瓜多尔总统:地震重建耗资数十亿美元 Ecuadors President says billions of dollars will be needed to help the country rebuild from the powerful eart
Final Vote Nears on Conserving Sharks Shark fin soup is a delicacy in Asia. But its popularity is helping to decimate shark populations. However, governments voted Monday (today) to protect five species of the predators. Preliminary approval came at
As summer approaches we all enjoy outdoor activities. But with sunlight becoming more intense we should protect our skin from harmful direct exposure to the sun. 随着夏日的到来,我们都喜欢进行一些户外运动。但因为日照愈加强