Their study is published online December 5 in the journal Nature Neuroscience.
该研究在12月5日发表于网上《自然神经科学》期刊上。
5 billion between November and December—an increase from 3.
从11月到12月，这个数字从3亿增长到了50亿。
The volume of trade went up by 5% in December alone.
12月单月的贸易额就增长了5%。
The volume of trade went up by 5% in December alone.
12月单月的贸易额就增长了5%。
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