扩大

to expand / to enlarge / to broaden one's scope

to enlarge

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

to extend the scope / to exaggerate

gene amplification

to expand production / to reproduce on an extended scale