用circulate among造句子，“circulate among”造句

Swine influenza viruses may circulate among swine throughout the year, but most outbreaks occur during the late fall and winter months similar to influenza outbreaks in humans.

circulate among one's friends

Two important UN draft texts about long-term cooperation action and the Kyoto Protocol have started to circulate among the delegations Friday morning at climate change talks in Copenhagen.

The wood that they had claimed two weeks ago was now theirs to circulate amongst themselves to help heat the small cabins where they all lived and fight the chill that came every night.