US magazine circulation continued to decline in the first half of 2010.
今年上半年，美国杂志发行量延续颓势。
2
The first was working in a circulation analysis department of a publishing empire made up of recently-merged and warring trade magazines.
第一次是当我在一家大出版公司(出版一些关于最新兼并和商战的杂志)的发行分析部工作时。
3
Because of this, people born before 1957, whose first experience of flu would have been the H1N1 viruses then in circulation, have some immunity to the 2009 H1N1 strain causing the current pandemic.
正因为如此，在1957年之前出生的人，亲身经历了H1N1病毒传播的流感，对引起目前大流行的2009 H 1 N 1株有某些免疫性。