Iceland has no shortage of natural dangers – volcanic eruptions, glacial floods, scaldingly hot springs and bitterly cold winters. But it is at least one of the few places on Earth where humans don't ...

“Sawfly（锯蜂）” 是一种与黄蜂相似的昆虫，这种昆虫会切开植物并把自己的卵产在切口处。苏格兰赫瑞-瓦特大学的研究人员一直在研究雌性锯蜂怎么知道如何做出这种独特的切割，从而避免杀死或损伤植物。

GUANGZHOU, Nov. 4 (Xinhua) -- The 138th Canton Fair, known officially as the China Import and Export Fair, came to a close on Tuesday in Guangzhou, the capital city of south China's Guangdong Province ...