单词:yeast propagator
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Matthew 16 1 The Pharisees and Sadducees came to Jesus and tested him by asking him to show them a sign from heaven. 2 He replied, [1] When evening comes, you say, `It will be fair weather, for the sky is red,' 3 and in the morning, `Today it will be
This is Scientific American's 60-Second Science. I'm Christie Nicholson . Got a minute? Altruism poses a problem for the theory of survival of the fittest. If we help others at a cost to ourselves, nice-guy behavior should die out, because we are giv
AUDIE CORNISH, HOST: Scientists have taken a big step towards making synthetic life. In other words, they figured out how to create a living thing with DNA that was written in a lab. NPR health correspondent Rob Stein has the details. ROB STEIN, BYLI
The U.S. ambassador to Kenya has angrily denounced print and broadcast advertisements placed by the government of President Mwai Kibaki, which accuses the United States and other Western countries of contributing to post-election violence in the coun
X Xerox/xerox n.复印机 v.复印 X-ray n.X射线,X光 Y yard n.院子,场地;码 yawn v.打呵欠 n.呵欠 year n.年,年度 yearly a./ad.每年,一年一度(的) yeast n.酵母 yell v.叫喊 yellow