血管畸形中血管极度扩张，VEGF表达极弱。
In vascular malformation, vessels dilated abnormally with weakly expressed VEGF.
2001年至2007年经济扩张周期的就业增长弱于90年代末的繁荣时期，因此雇主加薪的压力也就更小。
S. Job growth during the 2001 to 2007 expansion was weak compared to the late 1990s boom, thus putting less pressure on employers to dole out pay increases.
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