单词	Viagra
释义	ViagraVi‧ag‧ra /vaɪˈæɡrə/ noun [uncountable] trademark Examples EXAMPLES FROM THE CORPUS The judgment does not affect Pfizer's patent for sildenafil citrate, the main ingredient of the anti-impotence drug Viagra. What are some possible side effects of Viagra? a drug that helps men to have an erection
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