单词：door latches
单词：door latches 相关文章
Sneezing, coughing, and sniffing. Welcome to winter and the common cold virus, a cure for which has eluded for years. But now a major breakthrough by scientists in Cambridge University brings that cure a step closer, as they've discovered a new way t
万花筒2010年
Evidence mounts that ancient Nubian brewers purposely made beer so that it contained a dose of antibiotic tetracycline. Christopher Intagliata reports 有证据表明努比亚的啤酒制造者故意在啤酒中加入抗菌四环素。 In 1980, a sci
60秒科学
In 1980, a scientist looking at bone fragments under an ultraviolet microscope noticed the bones were glowing greena hallmark of the antibiotic tetracycline. The drug latches onto calcium and gets deposited in bone. Nothing unusual. Except these bone
Scientific American(九)月
Nano Tool Watches Teardrop Protein Destroy Bacteria About a hundred years ago, a Scottish biologist discovered that proteins called lysozymes in human tears can kill bacteria. Scientists have studied the enzyme extensively, but molecular biologist Gr
VOA标准英语2012年(一月)
Volcanoes forged the rocky coast of Cabo de Gata in southeast Spain. But the tides blanket it with reef-like structures built by snails. An algine marine biologist Diego Moreno says this sea of life can be deadly. Filth and contaminants accumulate on
自然百科2008年
Monica: Actually, we were going to have lasagna. 实际上，我们本来是要吃千层面的。 Mr. Geller: oh, I love lasagna. 哦，我喜欢千层面。 Monica: But now we are not having it. 不过我们现在没有了。 Mrs. Geller: Then why y
老友记精校版第1季