单词：sediment grain
单词：sediment grain 相关文章
Roughly 1,000 years ago, Europe enjoyed several centuries of balmier average temperatures. Dubbed the Medieval Warm Period, it was the last time before the present that agriculture could flourish in Greenland. This era also provided fodder for countl
Scientific American(十一)月
Lake Sediment Could Better Date Ancient Finds Radiocarbon dating is the best-known and most widely used method to determine the age of organic material, such as bone or wood or plant matter. All such material contains radioactive carbon atoms, known
VOA标准英语2012年(十月)
Russia, once the world's third largest wheat exporter, is returning to the international grain market after a one-year gap caused by severe crop losses. Moscow stopped selling wheat last year after catastrophic fires and drought destroyed one-third o
英语新闻
今天我们要学的词组是against the grain。 Grain是谷子，不过在这里，grain指的木材的纹理。木工都知道，刨木头一定要顺着木材的纹理；You cannot polish wood against the grain. 作为习惯用语，against the
英语单词荟萃
AGRICULTURE REPORT - World Grain Supplies Expected to Shrink Further By Mario Ritter Broadcast: Tuesday, April 27, 2004 This is the VOA Special English Agriculture Report. The Food and Agriculture Org
农业与发展