主流
main stream (of a river); fig. the essential point; main viewpoint of a matter; mainstream (culture etc)
珠流
fluent with words; words flowing like pearl beads
珠流璧转
lit. pearl flows, jade moves on (idiom); fig. the passage of time; water under the bridge
猪流感
swine influenza; swine flu; influenza A (H1N1)
猪流感病毒
swine influenza virus (SIV)